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Physics Instruments

 
 
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Physical Balance (7-Stone)
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Physical Balance (7-Stone) (1001 )

Basic general purpose balance. The hangers have double hooks for up thrust experiments and detachable pans. Capacity 200gms. Sensitivity 2 mg. With 7-stones knife edge agates. Durable finish in golden color lacquer with nickel plated fittings. The balance is mounted on a sturdy sunmica wooden base complete with leveling screw. The whole balance is housed in a teak wood show case with panel doors (Supplied w/o weights). Specifications : Knife Edges: Agate Bearing: Agate Capacity: 200g Sensitivity: 2 mg Pans: Inverse stainless steel, dia 70 mm Overall: 420x240x380 mm Dimensions: (lx bx h)

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Dispensing Balance
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Dispensing Balance (1002 A )

Chemicals or small objects up to 100 gm can be weighed to within 15 mg with this economical model. The brass beam support is mounted on the wooden base (sunmica top) equipped with a drawer for holding weights and other equipments. Without weights. Cat. No. Capacity 1) 50 gms. 2) 100 gms.

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Physical Balance (3-stone)
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Physical Balance (3-stone) (1002 )

Same as cat. No.1001 but fitted with 3-stone knife edge agates, sensitivity 5 milligram, other specifications are same. (Supplied w/o weights).

Specifications :

 

Knife Edges:

Agate

Bearing:

Agate

Capacity:

200g

Sensitivity :

5 mg

Pans:

Inverse stainless steel, dia 70 mm Overall 420x240x380 mm Dimensions (lx bx h)


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Physical Gram Weights Spar Brass C.P. ‘PSAW’
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Physical Gram Weights Spar Brass C.P. ‘PSAW’ (1003 B)



Cat. No.

Capacity

a)

1 gm

b)

2 gm

c)

5 gm

d)

10 gm

e)

20 gm

f)

50 gm

g)

100 gm


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Physical Weights Boxes (Cylindrical Weight, Brass C.P.) ‘PSAW’
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Physical Weights Boxes (Cylindrical Weight, Brass C.P.) ‘PSAW’ (1003 A)

Superior quality having most accurate cylindrical brass weights, complete with forces and fraction weights, supplied in a superior quality, cabinet polish wooden box.

Cat. No.  

Capacity

1)           

  100 gm
2)              200 gm.

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Physical Weight Boxes ‘PSAW’ (1003)

Superior quality having accurate brass weights in nicely teak polished wooden box with sun mica top. Complete with forceps and fraction weights.


Cat No.

Capacity

1)

50 gm

2)

100 gm

3)

200 gm


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Riders Aluminm ‘PSAW’ (1004 B)

For analytical balances specify 5mg or10mg size slotted weights .

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Analytical Fractional Weights Spare ‘PSAW’ (1004 A)

Any weight spare from 1mg to 500 mg in 1 doz. Packing

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Fractional Weight Set Analytical ‘PSAW’ (1004)

PSAW these are good quality aluminium weights from 1 mg to500mg with duplicate of 2.20 and 200 mg. a total of 12 weights in set. They are calibrated strictly within the error limitn of tolerance permitted byN.P.L India . Quallity is class ‘B’These weights are supplied in beautiful round plastic case.

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BALANCE DIAL TYPE
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BALANCE DIAL TYPE (1005)

A

1 KG

B

5 KG

C

10 KG


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Balance pan Empty for spring ‘PSAW’ (1006 )


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Spring Balance Metric ‘PSAW’
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Spring Balance Metric ‘PSAW’ (1007)

Flat form with zero and adjustable device with anodized metal scale. Metal parts richly plated in high impact polystyrene body. Suspension loop at top and load hook at the lower head. Individually packed in a beautiful cardboard box.

Cat. No.

Capacity

1)

50 gms

2)

100 gms

3)

250 gms

4)

500 gms

5)

1000 gms


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Spring Balance Tubular ‘PSAW’
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Spring Balance Tubular ‘PSAW’ (1007 A)

All plastic moulded body, this scale is made from self adhesive aluminum sticker. Suspension loop at top and load hook at the lower head. Individually packed in a beautiful cardboard box

Cat. No   

Capacity
1)              100 gms

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LEVER BALANCE. ‘PSAW’
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LEVER BALANCE. ‘PSAW’ (1008)

An inexpensive and robust single pan balance which will give consistent and rapid readings with an accuracy well within the scale reading it has two ranges, reading 250 x 1gm and 1000 x 10gm. The zeros of the scales correspond so that no relevelling is necessary when changing range

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Triple Beam Balance ‘PSAW’
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Triple Beam Balance ‘PSAW’ (1009)

For direct reading with sliding weight and for quick weighing with triple beam facilities. Its outstanding characteristics its great convenience due to the fact that the balancing weights are permanently secured to the beams. An adjusting screw is provided for leveling the beam which is enclosed in a metal guard to provide protection from of bending or break in. The balance is fitted on a metallic base.

Cat. No.

Capacity

1)

111 gms

2)

310 gms

3)

610 gms


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Balance Beranger Capacity 5 Kg. (1010 )


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Battery Hydrometer  ‘PSAW’
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Battery Hydrometer ‘PSAW’ (1011 )


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Babinet Compensator ‘PSAW’
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Babinet Compensator ‘PSAW’ (1012 )

The instrument consists of two round scales. One with index and the other with vernier. The first scale (index scale) is for turning the analyzer into the azymuth. The second scale (vernier scale) is for measuring the degree of orientation of a wedge box. The wedge box contains two wedges cut in mutually perpendicular direction of optics axis in quartz. The long wedge is movable by means of a micrometer screw minimum reading of the movement is taken. Micrometer screw minimum reading 0.001 cm. 1291 (a) Without Quarter Wave Plate 1291 (b) With Quarter Wave Plate

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Compound Pendulum (S. Steel, Rod Type) ‘PSAW’
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Compound Pendulum (S. Steel, Rod Type) ‘PSAW’ (1013 C )

It consists of a stainless steel rod of 1 meter long and 1.0 cm diameter. The 5.s. rod is marked with lines at equal distance of 5 cm. Two circular removable knife edges are provided, complete with wall bracket & two circular knife edges.

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Compound Pendulum (Brass C.P.) ‘PSAW’ (1013 B )

A chrome plated brass bar of dimension 100x25xO.5 cm bored at equal intervals of 5cm and provided with two removable knife edge. Complete with wall bracket.

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Compound Pendulum (Steel C.P.) ‘PSAW’
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Compound Pendulum (Steel C.P.) ‘PSAW’ (1013 A )

It consists of a powdered coated steel bar of dimensions 100x3.75xO.5cm with a number of equidistant holes drilled along its length at equal intervals of 5 cm. The pendulum is provided with two removable knife edges passing through any one of the holes. Complete with wall bracket & two removable knife edges

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Stand for Kater's reversible Pendulum of Compound pendulum.  ‘PSAW’
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Stand for Kater's reversible Pendulum of Compound pendulum. ‘PSAW’ (1014 )

This stand is suitable for all types of compound pendulums or Kater's pendulums listed above. Heavy type stands having approx. height 52 inches

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BAROMETER FORTINS  ‘PSAW’
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BAROMETER FORTINS ‘PSAW’ (1015)

For school/college laboratories. Nominal 6 mm bore glass tube. With engine divided dual scales 675 to 820 x 1 mm Hg and 26.5 to 32.5 x 0.05 inch Hg. Verniers reading 0.05 mm and 0.002 inch. Mounted on polished wooden board for wall mounting. Supplied without mercury but with instructions for filling
SPARE S

(A)

Standard Model 8 mm Borosil glass tube

(B)

Deluxe Model 10 mm Borosil glass tube
(C) Leather Bag

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Anderson Bridge for Self – Inductance ‘PSAW’
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Anderson Bridge for Self – Inductance ‘PSAW’ (1016)

This bridge method is more complicated than those which have been described so far. The bridge has the following characteristics :

P =

consists of three ratio dials of 10, 100 & 1000 ohms.

Q =

consists of three ratio dials of 10, 100 & 1000 ohms.

R =

non-inductive resistance of 1000 ohms (fixed value).

S =

A variable non - inductive resistance in the form of 3 decades of 1 x 10, 10 x 10 & 100 x 10 ohms. This resistance also includes the resistance of self - inductance ‘L’ which is also connected to the same arm.

M =

A non-inductive variable resistance of 3 decades of 10 x 10, 100 x 10 & 1000 x 10 ohms.

C =

A standard capacitance provided in the bridge in the form of a single decade of 10 x 0.01 mfd. Supplied with unknown inductance L whose value is to be calculated.

Supplied without headphone and oscillator

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Conductivity Attachment ‘PSAW’ (1020 C )

It is an arrangement to hold specimens in the form of wires, rods strips etc. Separate current & potential terminals are provided. Distance between potential points is 50 cm. It can hold specimen of any size between ˝ “ dia. rod 42 S.W.. wires.

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Adjustable heavy heavy duty D.C. Current source 1020 B (1020 B)

The unit is mains operated and can deliver a continuously adjustable D.C. Current of 0-10 Amp maximum. The unit consist of a variac, a step down transformer, a bridge rectifier, filter circuit and an ammeter of 0-10 A to read current. Two heavy brass terminals are provided for output Input voltage: 230 V A.C. Mains 50 c/s. D.C. Output : Approx. 0-10 V, continously adjusted to give a variable current of 0-10 Amp depending upon external load.

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Industrial Kelvin Double Bridge Cat 1020 A (1020 A)

Standard Resistance: There are 10 coils of .01 ohm each arranged on a rotary dial plus a circular slide wire of total resistance .01 ohm and 500 sub divisions is equal to .00002 ohms on the normal range. Multiplying Ratios: A single rotary switch furnishers 5 multiplying ratios of x 100, x 10, x 1, x .01 and x 0.01. Range of measurement: The bridge has a range of .0000002 ohm to 11 ohm. Max. Current: 10 A intermittently & 5 A continuously. Panel: A bakelite panel enclosed in a teak wood box is used. Separate current and potential terminals, battery and galvanometer terminals, push buttons for battery and galvanometer are provided on the panel. Accuracy: ± 0.5% current 5 Amps upto 10 Amps. Coils: Mangnin coils are used.

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Induction Coil ‘PSAW’
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Induction Coil ‘PSAW’ (1021 B )

For use with kohlrausch conducting bridge

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Hamburger Coil ‘PSAW’ (1021 C )

Conductivity Coil with platinum electrode for use with kohlrausch conductivity bridge, Dip type.

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Kohlrausch Conductivity Bridge ‘PSAW’ (1021 A )

A circular slide wire is calibrated from 0.01 to 10 ohms. A rotary dial furnishers 6 mutipliers of 0.1, 1, 10, 100, 1000 & 10000. Range of measurement is 0.01 to 100 K Ohm. Terminals for supply and head phone detectors are provided on the panel. A detector key is also provided. The position of slider is adjusted to the position of minimum sound. Accuracy of coils ± 0.1%. Accuracy of measurement ± 1% at mid scale ± 2% overall. Accessories for Kohlrausch Conductivity Bridge

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Maxwell’s Inductance Bridge ‘PSAW’ (1022 A)

We can also measure self inductance with the help of this bridge.

P= R3 = consists of standard decade dial of 3 dials - 10 x 10, 100 x 10 & 1000 x 10 ohms.
Q = R4 = consists of standard decade dial of 3 dials - 10 x 10, 100 x 10 & 1000 x 10 ohms.
  R2 = consists of standard decade dial of 3 dials - 0.01 x 10, 0.1 x 10 & 1 x 10 ohms.
  L1 = single dial inductance box (10 mH to 100 mH) is to be connected from outside.
  R2 = is connected in series with L1 to form third arm denoted as R.
  L2 = unknown inductance whose value is to be calculated is connected in the fourth arm S. Schering Bridge
P = R1 = consists of ratio dial 1, 10, 100 & 1000 ohms.
  R2 = consists of ratio dial of 1, 10, 100 & 1000 ohms.
  C2 = Gang capacitor of 500 pf.
  Q = In this arm C2 is placed in parallel with R2 to form second arm cd.
R = C3 = consists of three dial condenser box of 0.001 x 10, 0.01 x 10 & 0.1 x 10 mfd.
  r = consists of three dial resistance box of 1 x 10, 10 x 10, 100 x 10 ohms.

Unknown capacitor C1 whose value is to be calculated is connected in series with r to form fourth arm S. Terminals for the connection of headphone, unknown capacitor and oscillator are also provided on the panel.

Supplied without headphone and oscillator.

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Maxwell’s Inductance Capacitance Bridge ‘PSAW’ (1022)


Terminals for the connection of oscillator, unknown inductance & headphone are provided on the bakelite panel.

  • R1 = 1st arm consists of ratio dial of 10, 100 & 1000 ohms (denoted as P).
  • The 2nd arm Q consists of ratio dial of 10, 100, 1000 ohms (denoted as R4) shunted by standard capacitance of 3 decade dial of 0.01 x 10, 0.1 x 10 and 1 x 10 mfd.
  • The 3rd arm R2 consists of a non-inductive resistance of 3 decade dial of 10 x 10, 100 x 10 & 1000 x 10 ohms (denoted as R)
  • The 4th arm (S) consists of unknown inductance L1 (whose value is to be calculated) in series with a variable non-inductive resistance R1 of 3 decades of 0.01 x 10, 0.1 x 10 & 1 x 10 ohm.
Supplied w/o headphone and oscillator.

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Bridge Platinum Resistance ‘PSAW’ (1023)

A

Range 0-500 °C

B

– do---- Platinum Resistance Thermometer


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Rayleigh Self Inductance Bridge ‘PSAW’ (1024)

The ratio arm is in two dials of 1, 10, 100 and 1000 ohm each. The rheostat arm is in three dials having decade of 0.1, 1 and 10. A slide having 0.17 ohm resistance is connected in series with unknown L. The slide wire is calibrated into 170 equal parts for easy calculation. A special double key is fitted to bridge. The key is internally connected with terminal for connecting battery and galvanometer. The bridge can also be used as an Wheatstone bridge.

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Owen’s Bridge ‘PSAW’ (1027 C)

P =

R1 = consists of ratio dial 1, 10, 100 & 1000 ohms.

 

 

R2 = consists of ratio dial of 1, 10, 100 & 1000 ohms.

 

 

C2 = Gang capacitor of 500 pf.

 

 

Q = In this arm C2 is placed in parallel with R2 to form second arm cd.

 

R =

C3 = consists of three dial condenser box of 0.001 x 10, 0.01 x 10 & 0.1 x 10 mfd.

 

 

r = consists of three dial resistance box of 1 x 10, 10 x 10, 100 x 10 ohms.

 

Unknown capacitor C1 whose value is to be calculated is connected in series with r to form fourth arm S. Terminals for the connection of headphone, unknown capacitor and oscillator are also provided on the panel.
Supplied without headphone and oscillator


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Student Kelvin Bridge  ‘PSAW’
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Student Kelvin Bridge ‘PSAW’ (1026 )


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Hay’s Bridge ‘PSAW’ (1027 B)

This bridge is modification of Maxwell’s bridge.

P =

Q = consists of ratio dial of 1, 10, 100 & 1000 ohms. Unknown inductance L is connected in series with Q to form 2nd arm.

 

 

S = consists of 3 dial resistance box of 10 x 10, 100 x 10 & 1000 x 10 ohms

 

 

R1 = consists of 3 dial resistance box 10 x 10, 100 x 10 & 1000 x 10 ohms.

 

 

C = consists of 3 dial condenser box of 0.01 x 10, 0.1 x 10, 1 x 10 mfd.

 

 

R1 = is connected in series with C to form fourth arm.

 
Three pair of terminals are provided for the connection of headphone, oscillator & unknown inductance L.
Supplied with headphone & oscillator.

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Wein’s Series Resistance Capacitance Bridge ‘PSAW’ (1027 A)

The bridge has  got the following main features :

R1 = consists of ratio dial of 1, 10, 100 & 1000 ohms.
R2 = consists of ratio dial of 1, 10, 100 & 1000 ohms.
r1 = consists of 3 dial resistance box of 1 x 10, 10 x 10 & 100 x 10 ohms.
r2 = consists of 3 dial resistance box of 1 x 10, 10 x 10 & 100 x 10 ohms.
C2 = consists os single dial capacitance box 0.1 x 10 mfd.
C1 = unknown condenser whose value is to be calculated.
r1 = is connected in series with C1 to form 3 rd arm ad.
r2 = is connected in series with C2 to form 4th arm ab.


Terminals for the connection of head phone, unknown condenser and bridge oscillator are provided on the panel.

Supplied without head phone and oscillator.

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Wein’s Bridge Frequency Measurement ‘PSAW’ (1027)

This bridge has been designed to calculate the unknown value of frequency of bridge oscillator.

R3 = R4 = consists of two ratio dials of 1, 10, 100 & 1000 ohms on the panel.

C1 = consists of capacitance box of two dial of 0.01 x 10 and 0.1 x 10 mfd.
R1 = consists of standard decade dial of 3 dials 10 x 10, 100 x & 1000 x 10 ohms.
C1 = is connected in parallel with R1 to form arm S.
R2 = consists of standard decade dial of 3 dials 1 x 10, 10 x 10 & 100 x 10 ohms.
C2 = is connected in series with R to form arm R. Three pairs of terminals are provided for headphone, bridge oscillator & two dial condenser box. Supplied without headphone, bridge oscillator & without two dial condenser box.
(C2 = Two dial condenser box is not supplied with this unit.)

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Potentiometer dial pattern ‘PSAW’ (1029 )

This compact and inexpensive potentiometer is ideal for introducing students to the method and techniques of e.m.f. Measurement. The design is simple and accurate measurements can be done with it. There are 10 coils arranged on a rotary dial plus a linear slide wire 50 cm long and subdivided into 500 equal parts. Terminals for battery, galvanometer and test circuits are provided on the panel. A thick knife edge jockey is provided to make contact on the slide wire.

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Potentiometer Digital with electrode ‘PSAW’ (1030 )


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Null Detector ‘PSAW’ (1031 D )

The null detector comprises a solid state amplifier having output stage with meter indication. The instrument is supplied in metal cabinet with Duco paint & aluminium front panel. The said detector has been designed for use with AC bridges (replaceable of headphone). While performing the experiment with four arm bridges, bridge oscillators & headphones are required in almost all the four arm bridges. Sometime good quality headphones are not available & also audibility of each student is different from the another. That’s why teachers are switching to null detector in place of headphone.

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Head Phone ‘PSAW’ (1031 )

Flexible type, with high resistance rece

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Headphone ‘PSAW’ (1031 )

A high resistance handset consisting of a pair of earphones, mounted on a spring steel strip head band. These headphones are suitable for any audio electric /electronic applications where output from the system is sufficient to drive a loudspeaker and are particularly recommended for use with all types of four arm bridges.

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Bunsen Burner brass pipe LPG/ Petrol with stop cock ‘PSAW’ (1032 A )


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	Bunsen Burner brass pipe LPG/ Petrol ‘PSAW’
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Bunsen Burner brass pipe LPG/ Petrol ‘PSAW’ (1032 )


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BAROMETER, ANEROID
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BAROMETER, ANEROID (1033 )

With 100mm dial graduated 28 to 31 inch of mercury and 960 to 1060 mill bars. With plated bezel, cover transparent and index 16cm dia approx.

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Terminals/ screws ‘PSAW’ (1034 A )


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Crocodile Clips ‘PSAW’
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Crocodile Clips ‘PSAW’ (1034 )

With strong spring and clamping screw for wires. The shank will accept 4 mm plugs.

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	Banana Plug/ Crocodile clips  ‘PSAW’
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Banana Plug/ Crocodile clips ‘PSAW’ (1034 )


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	Battery Hydrometer  ‘PSAW’
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Battery Hydrometer ‘PSAW’ (1035 )


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	Bending of Beam Apparatus  Koenings Method ‘PSAW’
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Bending of Beam Apparatus Koenings Method ‘PSAW’ (1036 A )

It consists of a brass beam 9mm square, one meter long, resting on the knife edges of two heavy table clamps. A sharp knife edge with hanger rest on the beam. Two tilting type mirrors (like optical lever) are also provided for this apparatus but w/o weights

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Bending of Beam Apparatus ‘PSAW’
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Bending of Beam Apparatus ‘PSAW’ (1036)

Consisting of two G. clamps with knife top. Comprising a metal powdered coated bar of 100cm length having width 2Smm and thickness 4.Smm. Sharp knife edge with hanger is also provided which moves on the metal bar. A spherometer fitted on a cast iron stand (specially designed for this apparatus) with electric contacts is also provided, supplied w/o weights.

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Bi- Prism Assembly without Optical Bench   ‘PSAW’
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Bi- Prism Assembly without Optical Bench ‘PSAW’ (1037)

Consists of the following apparatus

a)Bi-prism Holder  : has the fine radial motion by a fine pitch screw
b) Auto Action /Lens Holder: with automatic spring action of equal opening and closing of both sides
c)Micrometer Eyepiece:  Ramsden Eyepiece, 10x is carried on a slider which moves along   a micrometer screw. Accurately made.
d)Optical Slit: Optically true, precision ground stainless jaws, spring action for opening of jaws eliminated to ensure original accuracy even after prolonged use. jaws open uniformly all along through a milled head. jaw alignment tested for optical accuracy. Made for a lifetime of trouble free use.
e)Condensing Lens: This lens is supplied with mount to condense the monochromatic sodium light


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Torsion Pendulum (Bridge Type, Bigger Size) ‘PSAW’ (1038 F)

Same as Cat. No. 1038 E but diameter of aluminum disc 25cm (larger size) and another smaller disc of iron c.p. has diameter of 10.5 cm and thickness 1.25 cm.

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Torsion Pendulum (Bridge Type, Small Size) ‘PSAW’ (1038 E)

Consists of an aluminum disc 25 cm diameter. Another small disc of iron c.P. having same diameter as the interior of a grooved area of the bigger disc. (the small disc has approx. 8 cm dia and 1.25 cm thickness) A tall U-Shape metal bridge with a split chuck, fitted into disc enable accurate suspension and torsion. Article of irregular dimension as large as brick can also be inserted in the U-Shaped suspension.

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Spare Universal Clamp ‘PSAW’ (1038 D)

Spare clamp which can be fitted to the wall as well as to the retort stand, useful for torsion pendulum, inertia disc, inertia bar and Maxwell needle etc

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Torsion Pendulum (5" Brass Disc) ‘PSAW’ (1038 C)

The torsion pendulum is an interesting example of simple harmonic motion, often overlooked by students. It is helpful in explaining the meaning of moment of inertia and moment of torsion and how they affect the period of vibration. The one end of suspension wire hangs from a Universal Clamp with the help o~ a chuck nut and the other end is clamped to a solid brass disc of 12.5cm dia and 1.25cm thick with the help of a chuck nut. A heavy metal ring of the same metal (brass) and the same outside diameter as the disc is included. When ring is placed on the disc, the moment of inertia, and therefore the period of vibration of the system, is increased. Supplied with universal clamp of Cat. No. 1038 A

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Torsion Apparatus Searle's Horizontal Pattern (One Meter Long) ‘PSAW’ (1038 B)

Same as Cat. No. 1038 B but with length of rod approximately 1100 mm.

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Torsion Apparatus Searl's Horizontal Pattern (Half Meter Long) ‘PSAW’ (1038 A)

Two cast iron feets each with 3 through holes and grub securing screws, separating by two support rods approx 600mm long, one of which is graduated in cm and mm. The wheel 165mm dia. over groove moving on ball bearings is provided with chuck to hold the test rod of 55cm long and 5mm dia with two aluminum scales graduated 30-0-30 in single degrees, mounted on pillar support, which are adjustable along the rod, two pointers with clamp for attaching to specimen, on each of brass and steel rods, cord and hook for carrying masses. Supplied without weights.

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Torsion Apparatus Searle's (Vertical Pattern) or Barton's Apparatus ‘PSAW’
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Torsion Apparatus Searle's (Vertical Pattern) or Barton's Apparatus ‘PSAW’ (1038)

A steel frame mounted on a heavy cast iron base with leveling screws. Upper end of the rod (under test) 900mm length and 5mm dia is clamped by a 3-jaw chuck and the lower end is clamped into the axis of a torsional drum which can be rotated by putting load in the scale pan passing over two frictionless pulleys. Freely sliding three circular scales graduated in single degrees can be clamped at any position. Three pointers for clamping to the test rod are provided. Complete with three other rods, strings and two scale pans, but without weights

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Boyle’s Law Apparatus ‘PSAW’
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Boyle’s Law Apparatus ‘PSAW’ (1039 A)

Comprising two glass tubes, one closed at the top and other tube open. Their lower ends are drawn out and connected together by 1 meter of rubber tubing./ Both tubes are mounted on sliding brackets which may be locked in any position on the metal supporting rods. Seasoned wood board Proximately 44” high carries a meter scale graduated from 0 to 100 cm. Fitted on heavy iron base with leveling screws. Supplied without mercury and rubber tube.

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BOYLES LAW APPARATUS ‘PSAW’
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BOYLES LAW APPARATUS ‘PSAW’ (1039)

A wide bore glass tube is mounted vertically in front of a scale graduated 0 to 60cm. Zero corresponds to the inside of the closed (top) end of the tube. Air is confined in the tube by a coloured oil contained in a metal pressure chamber which is fitted with a Bourdon type gauge calibrated 0 to 50Lbs/In 2 & 3.5Kg/cm 2 actual pressure. A valve is fitted to the air tube from the pump. As the pressure in the oil chamber is increased, oil and its actual (total) pressure are directly indicated. The tube is of strong glass and securley covered with transparent plastic screen on front. Total height of apparatus 69cm approx.

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Transformer for Calender & Barne's Apparatus ‘PSAW’ (1040 A)

Specially designed for use with above apparatus cat no. 1040 having five tapings of 6, 12, 18, 24 & 30 volt A.C. and current 3 Amp

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Continuous flow Calorimeter, (Calendar and Barne's Method) ‘PSAW’
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Continuous flow Calorimeter, (Calendar and Barne's Method) ‘PSAW’ (1040)

The apparatus consists of a horizontal corning glass tube open at both ends. The heating element is a coil about 40cm long of Ni-chrome wire and is wound spirally inside the axis of the glass tube. The element is easily detachable and is encased in a wooden case lined with felt and provided with a hinged cover. "terminals are brought at each end of the tube for the electrical supply. The horizontal tube is connected either by rubber tube or rubber cork to the inlet and the outlet system, each having a short vertical extension to accommodate a thermometer. The complete apparatus is mounted on a polished wooden base board. Supplied with constant level tank fitted on stand but without thermometer & Transformer.

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	SET OF RODS FOR THERMAL CONDUCTIVITY ‘PSAW’
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SET OF RODS FOR THERMAL CONDUCTIVITY ‘PSAW’ (1042 E)

A set of metal rods 300x3mm dia. comprising ten of each, Aluminium (240), Iron (72), Copper (395), Lead (34), Brass (128), Zinc (112) Total of 60 rods.

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STEAM TRAP GLASS ‘PSAW’ (1042 D)

Made from borosilicate glass, overall length 160mm

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MOUNTED JOULE METER ‘PSAW’ (1042 C)

A domestic electricity meter adapted to operate single phase 2, wire CI.2 mA x 8.33 A 12V 50Hz 0.01rev/J and dials reading in joules. The meter is mounted on a robust bench stand with 4mm input and ouyput socket terminals.The aluminium disc rotates once every 100 joules with the consumption recorded on three digits calibrated 100, 1000 and 10000 joules per division respectively. The instrument records a maximum of 99,900 joules.

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	VENTILATION APPARATUS ‘PSAW’
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VENTILATION APPARATUS ‘PSAW’ (1042 B)

Comprising metal box 220x100x165mm (length x width x height), with sliding glass front, two glass chimneys standing over tubulures at top of box. Candle holder fixed at the base of box beneath the left hand side chimney. Spare glass chimneys Spare glass door

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	CROOKE’S RADIOMETER ‘PSAW’
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CROOKE’S RADIOMETER ‘PSAW’ (1042 A)

Comprising of partly evacuated glass bulb approx. 70mm dia. containing at its center a fine pivot which supports four light weight metal arms. One side of each vane is blackened, the reverse side is bright. Mounted on round base, when exposed to sunlight the vanes rotate.

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	CALORIMETER, COPPER ‘PSAW’
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CALORIMETER, COPPER ‘PSAW’ (1042)

75x50mm dia. resting on felt pad inside an outer vessel, 100x75mm dia. Outer vessel fitted with detachable clip type thermometer support. Complete with stirrer.

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Joule Calorimeter (4
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Joule Calorimeter (4"x3") ‘PSAW’ (1043 B)

Same as above cat no. 1043 A but with copper Vessel of 4"x 3"

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Cantilever Apparatus ‘PSAW’ (1044)

In this apparatus, a hook is provided to one end of powdered coated bar having dimension 100x18x 0.3 cm (LxBxW). The whole metallic bar is marked with lines. All lines are separated from each other by a distance of 5 cm. The cantilever bar is held horizontally keeping its breath in horizontal position

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Capillary Tube Apparatus
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Capillary Tube Apparatus (1045 B)

It consists of rising table (as described under Cat. No. 1045 A) and capillary tube clamp (as described under Cat No. 1045) In this case three leveling screws of rising table are replaced by two leveling screws and one long rod to hold the capillary tube clamp.

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Capillary Tube Clamp ‘PSAW’ (1045)

The apparatus comprises a metal frame, on which three capillary tubes of 10cm long Borosilicate glass and of different internal diameters are clamped with the help of small metal brackets. The 9mm rod is also attached to a metal plate, so that the complete clamp can be held in any stand for determining the surface tension of liquid by capillary rise method.

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	Joule Calorimeter (3
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Joule Calorimeter (3"x2") ‘PSAW’ (1043 A)

It consists of a copper vessel of 3"x2" with outer vessel as a superior quality teak wood box of size 9.5 x 9.5 x 11.5 cm fitted with bakelite lid with hole for thermometer and stirrer.

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Cathetometer L- Shaped ‘PSAW’ (1046)

An instrument of great stability for quick, accurate handling. Life time stainless steel scales and verniers and fine achromatic optics make this a precision instrument of universal choice for normal experiments and for research. The instrument is designed for use in the vertical and horizontal plans.The vertical guide bar is made of gun metal and is of a special type. It rotates on ball centress having bearings and can be clamped in any position. The cast iron frame supporting the vertical guide bar is fitted with leveling screws. Range either 50cm or 100 cm.

Measuring Range

:0to 50cm or 0 to 100 cm

Length of scale

:103mm

Magnification

:10 x

Visual distance

:100m to infinity

Graduation

:0.5 mm in division

A)50 cm long graduated bar
B)100cm long graduated bar


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Spare Cooper Pot for Daniel Cell ‘PSAW’ (1047 E)

Spare Cooper Pot for Daniel Cell ‘PSAW’

Cat. No.

Size

a)

5 ½”x 3 ½”

b)

6” x 4”


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	Daniel Cell (Complete) ‘PSAW’
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Daniel Cell (Complete) ‘PSAW’ (1047 D)

Same as above but copper pot is of bigger size approx. 6” x 4” size. Rest specifications are same as above.

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WORCESTER CIRCUIT BOARD ‘PSAW’ (1047 B)


Kit consists of baseboard terminals, set of metal connection pillars and a number of clip-on-connection strips and accessories. Units enable a variety of circuits to be constructed
quickly. Supplied with all accessories without cells.
Spares
A Plain Connector pack of 12
B Lamp Connector with lamp pack of 9
C Mounted Bell push pack of 2
D Rheostat Connector
E Circuit Board only


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PLATES FOR SIMPLE CELLS ‘PSAW’
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PLATES FOR SIMPLE CELLS ‘PSAW’ (1047 A)

Each plate is 125x50mm and is fitted with a 4mm socket terminals.
Material Thickness
A Zinc 1.5
B Carbon 6
C Copper 1.5
D Lead 1.5


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Simple Cell ‘PSAW’
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Simple Cell ‘PSAW’ (1047)

For studying the construction and characteristic of a voltaic cell. It consists of copper plate, zinc plate and plastic jar without solution.

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Daniel Cell (Complete) ‘PSAW’ (1047)

This cell is steady & reliable and may be used as open or close circuit works. It consists of a zinc rod immersed in a very dilute solution of sulphuric acid in an empty porous pot which in turn, is immersed in copper sulphate solution. This cell consists of copper sulphate solution. This cell consists of copper pot of approx. Size 5 ˝ “x 3 ˝ “. Chemicals are not included (only copper pot Daniel cell of size 5 ˝” x 3 ˝”, empty porous pot and zinc rod is provided).

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	Lechlance Cell ‘PSAW’
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Lechlance Cell ‘PSAW’ (1048)

Because of its higher e.m.f. (15 V) and lower internal resistance, this cell will deliver a stronger current for short period of time compared to the daniel cell. It consists of a plastic container 95 x 95 x 150 mm length x width x height. The rim is shaped to accommodate the cathode a zinc rod with terminal. A carbon anode with terminal is sealed in a filled porous pot containing the depolarizer. We provide filled porous pot for anode. Requires approx. 500 ml ammonium chloride electrolyte with zinc rod and filled porous pot. Supplied without electrolyte.

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	Hoffman’s Voltmeter ‘PSAW’
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Hoffman’s Voltmeter ‘PSAW’ (1049 C)

For demonstrating decomposition of water. This design is preferred for work of best precision. Platinum electrodes are used for electrolysis of water. The electrodes are mounted with rubber stoppers for insertion in the open ends of the voltmeter limbs. The glass unit has two connected limbs, integral with reservoir tube and funnel shaped bulb, with a stop clock at the top of each limb. Supplied with suitable metallic stand, helps to prevent accidental breakage. Glass parts are made from corning glass.

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	Water Voltameter ‘PSAW’
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Water Voltameter ‘PSAW’ (1049 A)

A very well made but inexpensive apparatus using platinum wire electrodes of generous size. Other specifications are same as above. Only eureka wire electrodes are replaced by platinum wire electrodes.

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Water Voltameter ‘PSAW’ (1049)

Cup shaped with fittings and two graduated test tubes. The glass vessel is mounted on a sturdy wooden base fitted with terminals and eureka wire electrodes. Supplied with brass metal test tube holder and graduated tubes.

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Battery lead accumulator 2 V, 20 AH (1050 )


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Battery cell 6 V uncharged (1051 )


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Nife Cell Alkali : charged 25 AH Disposal crate of 2 cell
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Nife Cell Alkali : charged 25 AH Disposal crate of 2 cell (1052 )


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Cell Electrolyte for Nife cell 450 gm (1053 )


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Clement & Disormies Apparatus ‘PSAW’ (1054 )


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Four Dial Condenser Box ‘PSAW’ (1055 D)

Ranges
1)10 x 0.001, 10 x 0.01, 10 x 0.1 & 10 x 1 mfd


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Three Dial Condenser Box ‘PSAW’ (1055 C)

Ranges
1)10 x 0.001, 10 x 0.01 & 10 x 0.1 mfd
2)10 x 0.01, 10 x 0.1 & 10 x 1 mfd


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Two Dial Condenser Box ‘PSAW’ (1055 B)

Ranges
1) 10 x 0.001& 10 X 0.01 mfd
2) 10 x 0.01 & 10 x 0.1 mfd
3) 10 x 1 mfd

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Single Dial Condenser Box ‘PSAW’ (1055 A)

Ranges
1) 10 x 0.001 mfd
2) 10 x 0.01 mfd
3) 10 x 0.1 mfd
4) 10 x 1 mfd


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Fixed condenser Boxes ‘PSAW’ (1056)

High quality silver mica, paper polyester and metal film condenser are mounted on the bakelite plate fitted in a steel plate fitted in a steel turf bakelite case. Two 4 mm socket terminals are provided. Working voltage 250 V for 0.01 mfd to 2 mfd capacitors and we use paper polyster capacitors up to this range. Working voltage 350 V for 5 mfd to 40 mfd capacitors and we use electrolytic capacitors up to this range.
Range
1) 0.01 to 0.1 mfd (any one range)
2) 0.2 to 0.5 mfd (any one range)
3) 1 mfd
4) 2 mfd
5) 5 mfd
6) 10 mfd
7) 20 mfd
8) 40 mfd
9) 60 mfd


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Constant Level Tank ‘PSAW’ (1057 )


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Electric & Non-Electric Apparatus ‘PSAW’ (1058 B)

Fitted with two carbon rods, a led and two terminals for D.C. Power supply. Supplied w/o solution & supply.

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Copper Voltameter ‘PSAW’ (1058 A )

Same as above but supplied without any jar.

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CUBIC DECIMETER. ‘PSAW’ (1059 D)

Made of hard wood, 10cm square side divided in square cm, having detachable top of 1cm, 1 line 10cm and one cube of 1cm.

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MATERIAL KIT SOLIDS 1059 C (1059 C)

Consists of two each of the seventeen blocks as follows: BLOCKS 50 x 40 x 30mm, softwood, hardwood, paraffin wax, aluminum, iron and polystyrene. BLOCKS 20 x 20 x 100mm Perspex, glass, slate, aluminum, Softwood, marble. BLOCKS, lead 50 x 50 x 20mm, aluminum 50 x 50 x 80mm, hardwood 50 x 50 x 200mm, brass 20 x 20 x 50 mm, iron 40 x 40 x 20mm

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DISSECTABLE CONE ‘PSAW’ (1059 C )

It can be dissected in 5 parts. All parts are fully finished and nicely painted, size approximately 15x25cm.

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IMMERSION HEATER ‘PSAW’ (1059 B )

Immersion heater for the above.

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METAL BLOCK CALORIMETER ‘PSAW’ (1059 A)

For the experiment determination of the specific heat capacity of different metals. Cylindrical metal blocks, mass 1kg adjusted to an accuracy of +/- 2%. Each block is drilled with 2 holes, a large central hole 12.5mm dia. for a special immersion heater and a smaller hole, 7.5mm dia. For thermometer or temperature sensor.

Metal

Dia

H

Specific Heat

Aluminium

76

84

878

Mild Steel

44

89

480

Copper

44

79

381

Brass

44

84

368


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Metal Cubes ‘PSAW’ (1059)

These metal blocks are intended for use as sinkers or for specific gravity measurements. Set of six different metals. The set consists one piece each of brass, aluminum, copper, zinc, iron and lead.
Three different size available are :

Cat. No.

Description

a)

10 mm

b)

20 mm

c)

25 mm



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Metal Cylinders ‘PSAW’ (1060)

These cylinders are often used in exercise with Vernier and micrometer calipers as well as for density and specific gravity measurement. The ends are carefully turned and surfaces are smooth. Set of six different elements in cylindrical form for density in electrical and thermal experiments. The set consists of one piece each of brass aluminum copper, zinc, iron and lead solid cylinders.
Three different size available are :

Cat. No.

Description

1)

25 x 12 mm.

2)

37 x 12 mm.

3)

50 x 12 mm.


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Deflection Magnetometer (Premium quality) ‘PSAW’ (1061 A)

The magnetic moments of a bar magnet can be compared quantitatively and the relative field intensities at various distance from a bar magnet can be measured. A highly sensitive compass box (with a permanent magnet) is mounted at the center of a non-magnetic wooden base about one meter long, am metric scale extending outward from each side of the compass box for observing the position of the magnet tested. The compass direction is indicated in degrees. It consists of 18 mm thick laminated board (both side sun mica) with dimensions 40” x 5” with suitable hole at the center for holding compass box. Supplied with permanent magnetic compass box but without magnet.

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Diffraction Grating ‘PSAW’ (1062 )

Hilger & Watt type size 38 x 50 mm approx. 15000 lines per inch for use in the standard holder in the spectrometer table.

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Dip Circle ‘PSAW’ (1064 )

Precision type. Designed for accurate and consistent readings. The importane features of the instrument is the provision of fixed collars on the bearings screws which make the needle removal and replacement easy.

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Drawing Board ‘PSAW’ (1065)

1

12” x 18” x 5/18 superior quality soft wood.

2

23” x 16” x5/8 superior quality soft woods.


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Solenoid Inductor ‘PSAW’ (1066 A)

A useful instrument for calibrating a ballistic galvanometer. The primary coil has 1000 turns and is about 100 cm long fitted on a wooden board. The secondary is in section with separate terminals for each section. Every section of the secondary has its own number of turns marked on the wooden board. Secondary coil has three taping of 100, 250 and 500 turns.

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Earth Inductor ‘PSAW’ (1066)

This is an improved form comprising a coil of different number of turns (500, 1000, 2000 or 5000 turns) of 36 SWG copper wire wound on an aluminum metal ring (150 mm dia). A stop limiting rotation to 1800 of the ring is provided with the help of the spring. The cradle supporting the coil of cast non-magnetic alloy 200 x 210 x 115 mm high may be placed either horizontal or vertical. Terminals for connections are mounted on the cradle supporting blocks.

Cat. No.

No. Of Turns

1)

500 turns

2)

1000 turns

3)

2000 turns

4)

5000 turns


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Electromagnet ‘PSAW’ (1067)

A coil is wound on each arm of a U shape bar of soft iron. The poles are 10 mm in diameter and ends are ground flat to make good magnetic contact with iron armature. It will operate on one more dry cells.

Cat. No.

Size

1)

3”

2)

4”


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Melde’s Apparatus ‘PSAW’ (1068)

This mass wise and powerful fork which has a frequency of approximately 60 vibrations per sec. is ideal for producing standing waves and is mounted on a heavy cast iron base. An electromagnet is arranged between the prongs of the fork without touching it. Asmall spring type strip is attached to the one of the prongs. A screw just makes a contacts with this strip. Supploed with scale pan, bench clamp with pulley but without weight and thread .

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Extension Board (1069 )


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Electrical Vibrator ‘PSAW’ (1070)

A thin steel rod (called vibrator) is clamped at one end and passes through a small solenoid. The rod is slightly flattened at the free end and a hole is drilled in it so that a string can be tied through it. The solenoid is connected to A.C. mains through a suitable lamp resistance. A permanent horse shoe magnet is mounted on the base board and a steel rod passes between them. The thin rod is magnetized longitudinally. The solenoid and a horse shoe shaped magnet cause it to vibrate with the frequency of A.C. supply. The length of the vibrator is adjusted until its natural frequency corresponds with that of the supply. The whole unit is mounted in a teakwood box. Complete with pulley, pan and cord.

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Fly Wheel ‘PSAW’ (1071 C )

Simple weights for 1070

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Fly Wheel ‘PSAW’ (1071 B )

Same as Cat. No. 1071 but provided with superior quality Indian make revolution counter.

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Fly Wheel (1071 A )

Same as Cat. No. 1071, but provided with disposable revolution counter

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ENERGY TRANSFER APPARATUS (MALVERN) ‘PSAW’ (1071 D)

A Fly-Wheel Unit
For use with a large motor/generator and a lamp unit to demonstrate the conversion of electric energy to kinetic energy and then back again. Comprising of an iron flywheel 115mm dia. mass 1.2kg, mounted in cast brackets with bearings. The shaft has an aluminum ‘V’ pulley 44mm dia.
for driving with belt supplied.
B Lamp Unit, Triple
For use with motor/generators to give an indication of their output when used as dynamos. The lamp holders are connected in parallel. Supplied with three lamps 3.5V 0.25A, M.E.S.

C Large Motor/Generator
For use as a driving unit or dynamo. Comprises a 2 to 6 V D.C. motor provided with a 15mm dia. ‘V’ pulley. Supplied with belt.

D Small Motor/Generator
For use with the larger motor/generator in comparing power input and output by driving each unit in turn with the other and metering the voltages and currents.

E Line Shaft Unit
For showing the conversion from electrical energy, via mechanical to potential energy by winding up a weight on a cord. One end of the 6mm steel shaft carries an aluminium ‘V’ pulley 56mm dia. and the end is fitted with a cord anchoring collar. Supplied with belt.

F Turbine/Pump Unit
For use as a water turbine to drive a generator producing electricity or for use as a pump driven by a motor and raising a head of water to produce potential energy. The rotor has 8 bucket blades and is housed in a block turbine chamber 50x50x25mm, with a clear Perspex front. Two
inlet tubules (for turbine and pump operation respectively) and one outlet tubule are provided, and the shaft carries a 15mm dia pulley. With driving belt.

G Spring Unit
For showing potential energy in a wound up spring and its conversion to electric energy by driving a dynamo and lighting a lamp. May also be used to wind up a weight on a cord showing the change from potential energy to kinetic and back to potential in the raised weight. The unit also has a ‘V’ pulley 56mm dia. dimensions 220 x100 x100mm high complete with driving belt.

H Head Of Water Unit
For use with turbine pump unit to provide an open or closed system in demonstrating the conversion from electrical to kinetic energy in the pump and potential energy in the head of water. Complete with two 80mm dia basins and shaped glass tubes. The upper platform has 38mm dia hole to allow use as a simple circulation system.

I Hand Wheel Driving Unit
For use in driving dynamos, line shafts, flywheels etc. The driving out pulleys are both 75mm dia. and the intermediate pulley is 20mm dia. giving a step up ratio of 3.75.

J Mounted Lamp 12V 24W
A 12V 24W S.B.C. bulb in a metal socket mounted on a folded metal base 100 x 63mm with a pair of 4mm sockets.

K Mounted Solar Cell
For use with the motor to demonstrate the production of electrical energy directly from light energy. The apparatus comprises of a selenium photo voltic cell housed in a plastic case with diffusing lens.

L Mounted Motor For Solar Cell

This is a small low consumption electric motor on a base  specially designed to run directly from the output of the solar cell.


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Fly Wheel ‘PSAW’ (1071)

Comprising of carefully machined and balanced cast iron wheel of about 20 cm in dia and 4.4cm thick, and steel spindle supported on the ball bearings in strong iron brackets. The sides of the wheel are red painted. The top of wheel is chrom~ plated and is marked with a thick red line. A pointer is fixed to one of the brackets. Diametric hole is drilled in the shaft to take a pin and cord. The base is provided, with four holes so that the apparatus can be fixed on a wall, complete with cord and hook.

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Fresnel Bi - Prism (1072)

A

30 x40mm

B

40 x 50mm



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Friction Board ‘PSAW’ (1074 B )

G. Clamp, iron for Cat no. 1074

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Friction Board ‘PSAW’ (1074 A )

Sunmica Top. Trolley, pan, weights 1 meter

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Friction Board ‘PSAW’ (1074 )

Sunmica Top. Trolley, pan, weights ˝ meter

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Ballistic Galvanometer ‘PSAW’ (1075 B)

Aluminium Case:
These galvanometers have been designed for very low current measurement.

Res:

100 or 500

Time Period:

8 to 12 Sec.



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Ballistic Galvanometer ‘PSAW’ (1075 A)

Bakelite Case:
These galvanometers have been designed for very low current measurement.

Res:

100 or 500

Time Period:

10 to 15 Sec



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Darsonal Galvanometer ‘PSAW’ (1076 )


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Portable Meter ‘PSAW’ (1077 C)

Portable meters are designed for use in the field, Test room and Laboratory.

Principal:

Moving Coil Type

Case:

Bakelite Panel with wooden Box.

Accuracy:

Class ± F.S.D

Scale Length:

144mm Approx

Knife edge Pointer and Anti parallax mirror scale.


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Inter scale Demonstration Meter ‘PSAW’ (1077 B)

Basic Monument:

5mA-100Mv F.S.D

Scale Length:

200mm approx.

Accuracy:

±2.5F.S.D

Dimensions:

300x150x300mm approx.

Weight:

2Kg approx.

Different interchangeable scales as per customer’s requirements can be supplied


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Demonstration Meter ‘PSAW’ (1077 A)

Horizontal type in transparent case and bakelite Base. It is very usful instrument for demonstration

Accuracy:

±2.5F.S.D

Scale Length:

85mm Approx.

Overall Size:

140x140x45mm


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DIALS, INTERCHANGEABLE ‘PSAW’ (1077 A)

For use with Cat. No. 1077. Each dial comprises of a laminated plastic panel 315x115mm with a sealed moulded box at one end, which contains the shunt or voltage
multiplier appropriate to the scale.

D.C Current D.C. Voltage A.C. Current A.C. Voltage

Range

Range

Range

Range

A

2.5-0-2.5mA

0-1V 0-1-0 mA

0-5V

B

10-0-10mA

0-5V 0-50mA

0-10V

C

0-10mA

0-10V 0-100mA

0-15V

D

0-50mA

0-15V 0-500mA

0-50V

E

0-500mA

0-300V 0-1A

0-300V

F

0-500mA

5-0-5V 0-5A

Millivolts

G

 

0-1A

10-0-10V

Range
H 0-5A 0-100mV


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DEMONSTRATION METER INTERSCALE ‘PSAW’ (1077)

Moving coil type with accuracy of +/- 2.5%. Basic sensitivity of meter is 5 mA, 100nV f.s.d. The meter can be used to demonstrate the working principle of AC or DC ammeters or voltmeters with the interchangeable plastic scales.

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Helmholtz Galvanometer ‘PSAW’ (1078 E)

It consists of two equal coaxial coils (parallel to each other) separated by a distance equal to the radius of the coils. The permanent magnetic compass is provided on the brass cup at the midway between them and in the same direction. The coils increase the uniformity of the fields in the middle and thus make it more sensitive. Supplied with a superior quality permanent magnetic compass box of cat. No. 1078 D

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Compass Box (Permanent Magnet) ‘PSAW’ (1078 D)

(For deflection magnetometer or tangent galvanometer) Consisting of thick bakelite moulded case of 125 mm dia with black aluminum dial graduated 0 - 900 four times, anti parallax mirror slot. The special permanent magnet (small in size) and a light aluminum pointer (designed for precise reading and maximum damping) supported on a steel pivot by jewel bearing sets. The permanent magnet is designed in such a way so that it has maximum magnetic fields strength.

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Compass Box (for deflection magnetometer or tangent galvanometer) ‘PSAW’ (1078 C)

Consisting of a bakelite moulding case with white aluminum dial graduated 0 – 90° four times. The magnet with aluminum pointer is pivoted at the jewel so as to move frictionless

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Tangent galvanometer ‘PSAW’ (1078 B)

(Economy Model - Aluminum Fitting) Same as Cat. No. 1078 but with brass cup and brass terminals are replaced by light weight aluminum cup aluminum terminals respectively. Brass leveling screws are replaced by bakelite leveling screws. Supplied with 5” ordinary compass box.

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Tangent Galvanometer (Premium Quality Lacquer Finish) ‘PSAW’ (1078 A)

The horizontal component of earth’s magnetic fields can be measured with good precision using this sophisticated instrument. Same as above but with heavy aluminum base terminals are replaced by heavy superior quality 4 mm socket terminals. The leveling screws and brass cup is lacquered in golden colour. The heavy tripod aluminum base is finished with superior quality Duco paint. Supplied with highly sensitive compass box with permanent magnet along with detailed working manual.

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Tangent Galvanometer (Brass fitting) ‘PSAW’ (1078)

It consists of a bakelite moulded ring 170 mm, with three sets of winding - either 2, 50 and 50 turns (depending upon the requirement) respectively, carfully insulated, connected to heavy brass terminals. The number of turns is clearly marked between the terminals. The ring is mounted on a pivoted round bakelite base which rotates on an aluminum tripod base fitted with three brass leveling screws. The high sensitive compass box (with permanent magnet) is mounted on a substance brass pillar and is free to rotate upon it. The compass is 5” in dia and has a scale graduated to single degrees. Overall height is approx. 9”. All brass parts are chrome plated. Supplied with permanent compass box.

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Ohm’s Meter ‘PSAW’ (1079 B )

Ohm’s meter is designed for measuring the resistance in electric circuits. It is housed in Unbreakable ABS case with clear transparent front cover and operated on 1.5 v AA cell. Size: 100x100x140mm

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Spot Reflecting Galvanometer ‘PSAW’ (1079)

This galvanometer has a built in lamp and scale arrangement bused in bakelite case.

Time period:

2 second Approx.

Resistance:

125 or 500 ohms

Sensitivity:

4 to 5µA

Main:

220 Volt A.C.

Battery & Main operated as per customer requirement.


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SEMICIRCULAR BLOCK ‘PSAW’ (1080 D)

Clear all faces polished

 

Glass

Acrylic

1

100x18mm

100 x 18mm

2

100x12mm

100x 12mm

3

90x16mm

90x 16mm


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ACRYLIC BLOCK, RECTANGULAR ‘PSAW’ (1080 C)

Clear acrylic all faces fully polished

1.

1. 75x50x18mm

2.

2. 125x65x18mm

3.

3. 100x65x18mm

4.

4. 115x65x20mm


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GLASS BLOCK RECTANGULAR ‘PSAW’ (1080 B)

Made from optical glass with optically worked surfaces, edges slightly beveled and glass free from bubbles.

1

75x50x12mm

2.

75x50x18mm

3

100x60x18mm

4

115x65x18mm

5

125x65x18mm


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SEMICIRCULAR BLOCK ‘PSAW’ (1080 B )

Clear all faces polished Glass Acrylic

A

100x18mm 100 x18mm

B

100x12mm 100 x12mm

C

90x16mm 90x 16mm


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ACRYLIC BLOCK, RECTANGULAR ‘PSAW’ (1080 A)

Clear acrylic all faces fully polished

A

75x50x18mm

B

100x65x18mm

C

125x65x18mm

D

115x65x20mm



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GLASS BLOCK RECTANGULAR ‘PSAW’ (1080)

Made from optical glass with optically worked surfaces, edges slightly beveled and glass free from bubbles.

A

75x50x12mm

B

75x50x18mm

C

100x60x18mm

D

115x65x18mm

E

125x65x18mm



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Ground Glass Screen : 3 in frame ‘PSAW’ (1081 )


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Electric Heater ‘PSAW’ (1082 )


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WAVE FORM, HELIX (SLINKY) ‘PSAW’ (1083 )

For demonstrating wave motion. Helical coil of flat section tampered steel wire. Coil dia 7.5cm length closed 10cm fully extended 3mt.

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Slotted weight for Cat No. 1084 ( Hook’s law ) ‘PSAW’ (1084 A )


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Hook's Law Apparatus ‘PSAW’ (1084 )

It consists of a support with mounted millimeter scale, a spiral spring, a hanger for weights. The scale is 12cm long, engraved on a plane mirror to permit parallax illumination by reflection and mounted with elevation adjustment on a support rod. The steel spring 1cm in diameter and 3 cm long when unstretched is suspended from a hook above the scale. Weights not included

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Hot Plate Round 8” dia Electrical ‘PSAW’ (1085 )


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Hydrogen Tube ‘PSAW’ (1086)

A.

Discharges Tube

B.

Special box with holder for 3 tubes

C.

High Voltage Transformer for above


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Hypsometer Copper ‘PSAW’ (1087 )

Comprising a Copper boiling vessel with a steam jacked in a tube. A lid with a tubule is provided, which holds the thermometer under test in a cork, supplied without thermometer.

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INCLINED PLANE ‘PSAW’ (1088 )

Simple hardwood, comprising, cut way base to allow cord to hang freely and hinged 60x7.5x1.9cm with aluminum pulley 28mm dia. and stepped lower face to accommodate wood block for setting at angles between 24 & 25 degree approx. With cylindrical metal roller and scale pan.

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TRACK FOR DYNAMIC TROLLEY ‘PSAW’ (1090 B )

A wooden track of 2 meter length with smooth surface.

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DYNAMIC TROLLEYS ‘PSAW’ (1090 A )

Metal, new design, die-casting very compact.

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DYNAMIC TROLLEYS, WOODEN ‘PSAW’ (1090 )

A pair of identical wooden trolleys (300mm long), mounted on three wheels. A spring loaded rod is fitted to give impulse when released. It has a provision for stacking the trolleys on top of each other with removable pins. Supplied with 3 elastic rings, 3 springs, 8 pins for stacking, 2 rubber corks, 2 needles and a release pin. Wheels fitted with ball bearings.

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Five Dial Inductance Box ‘PSAW’ (1091 D)

Cat. No.

Ranges

1)

100 micro henry to 1 henry


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Three Dial Inductance Box ‘PSAW’ (1091 B)

Cat. No.

Ranges

1)

100 micro henry to 100 milli henry

2)

1 milli henry to 1000 milli henry

3)

10 milli henry to 100 henry


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Two Dial Inductance Box ‘PSAW’ (1091 A)

Cat. No.

Ranges

1)

100 micro henry to 10 milli henry

2)

1 milli henry to 100 milli henry

3)

10 milli henry to 1000 milli henry

4)

100 milli henry to 10 henry


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Single Dial Inductance Box ‘PSAW’ (1091)

Cat. No.

Ranges

1)

100 micro henry to 1000 micro henry

2)

1 milli henry to 10 milli henry

3)

10 milli henry to 100 milli henry

4)

100 milli henry to 1000 milli henry

5)

1 henry to 10 henry


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Four Dial Inductance Box PSAW (1091 C)

Cat. No.

Ranges

1)

100 micro henry to 1 henry

2)

1 milli henry to 10 henry


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Fixed Inductance Boxes PSAW (1092)

The air cored inductance coils are fitted in a steel turf bakelite case, elegant finished. The frequency response is 1000 cycles/sec. Accuracy 2.5%.

Cat. No.

Ranges

1)

100 micro henry to 1000 micro henry

2)

1 milli henry to 1000 milli henry

3)

1000 milli henry to 1500 milli henry

(Any one desired range)

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Inertia Disc PSAW (1093)

Consisting of a brass disc about 15cm in diameter, 6 mm thickness, with arrangement for clamping a split chuck. Supplied with wall bracket.

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Moment of Inertia Table PSAW (1094 )

It consists of an aluminum disc of approximately 6" dia with a groove. The circular aluminum disc supports five semicircular masses which just fit into a groove, concentric with the circumference. It can be suspended by a steel wire pivoted at the centre of a long frame work, provided with circular base which is also fitted with leveling screws. Supplied with four different shapes of masses (Rectangular, Square, circular and triangular.)

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Inertia Bar PSAW (1095 )

It consists of a solid brass rod of length 30cm and diameter 1.5cm with centre split chuck for clamping and suspending. Supplied without wall bracket.

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Jaeger's Surface Tension Apparatus PSAW (1096 )

This method is suitable for the purpose of studying the variation of surface tension, with concentration of solution of common salt in water. Complete with manometer tube fitted on the stand, conical flask with side tube, dropping funnel, three different bore jets and beaker etc.

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Spare wall Bracket for Compound Pendulum or Kater's Pendulum PSAW (1097 C )


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Kater's Reversible Pendulum Brass or S.S. PSAW (1097 A )

Specifications are same as above cat no. 1097 but it consists of brass or stainless rod instead of steel C.P. rod. Two metal weights are also made of brass instead of cast iron. Other specifications are same as above.

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Kater's Reversible Pendulum Steel C.P PSAW (1097 )

It is a compound pendulum constructed on the principle that centre of oscillation and centre of suspension are interchangeable. It consists of a steel rod of l20cm long and 1.0 cm dia capable of two adjustable knife edges facing each other. Two metal weights (made of cast iron) of dimension 7.5 x 3.75cm (length x diameter) and (3.5 x 3.75) respectively can be made to slide along the length of the bar and can be clamped in any position. Two wooden weights exactly similar to metal weights can also slide along the bar. With the help of this apparatus we can find acceleration due to gravity at a place.

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Stand for Kater's reversible Pendulum of Compound pendulum. PSAW (1098 )

This stand is suitable for all types of compound pendulums or Kater's pendulums cat no. 1097 listed above. Heavy type stands having approx. height 52 inches.

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Kundt’s Tube Deluxe Pattern PSAW (1099 )

A glass tube 100 cm long and 3.8 cm in diameter.fited on a base. A rod about 60 cm long is held firmly at its mid point in a sturdy clamp at one end of the base. One end of the rod has a metal disc attached to it and projects into the glass tube. The other end of the tube is closed by a close fitting piston mounted on the base such that its position in the tube is adjustable through 20 cm approx..

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Kundt’s Tube PSAW (1099 )

A glass tube 100 cm long and 3.8 cm in diameter is mounted in a ‘Y’ on a metal base .A rod about 60 cm long is held firmly at its mid point in a sturdy clamp at one end of the base . One end of the rod has a metal dics attached to it and project into the glass tube. The other end of the tube is closed fitting piston mounted on the base such that its position in the tube is adjustable through 20 cm. app. The ‘Y’ supporting the tube may be adjusted vertically and laterally untill the metal disc will not touch the glass. Coiled spring attached to the ‘Y’ holds the glass tube in position.

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Carry Foster Key PSAW (1100 )

Fitted bakeliteb plates with brass C.P. Cup.

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Raleigh’s Key PSAW (1101 A )

Fitted onthick bakelite bases with all brass part

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Charge and Discharge Key PSAW (1101)

Used for charging and discharging of a capacitor nickel plated brass strips and pillars are used. Three terminals for connection fitted on a thick bakelite plate.

Contact Resistance

: 2 milli ohm approx.

Max. Current

: 5 Amps.

Dimension LxBxH

: 15 x 100 x 80



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Morse Key PSAW’ (1102 )

Superior quality on Bakelite base.

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Plug Key With brass block of 12 mm PSAW (1103 B)

Same as above but with brass block of 12 mm thick mounted on a heavy bakelite base provided with all brass terminals.

Cat. No.

Size

1)

1 way

2)

2 way

3)

3 way



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Plug Key With Brass block of 10.5 mm PSAW (1103 A )

Thick brass of 10.5 mm fitted on heavy bakelite base provided with all brass terminals and screws.

Cat. No.

Size

1)

1 way

2)

2 way

3)

3 way


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Plug Key With Brass Block of 9 mm PSAW (1103)

With brass blocks of 9 mm rectangular with all brass terminals and screws.

Cat. No.

Size

1)

1 way

2)

2 way

3)

3 way


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Pohl’s Commutator PSAW (1104 C )

Used in experiments on hyteresis. The thick brass sheet contact arms and the joining strips are fitted on bakelite base. Operation of the contact arm is done with a bakelite handle. The terminals are provided on the sides of the square base. Max current 5 amp. Supplied without mercury.

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Reversing Key Commutator M.I.P. Type (1104 B )

The four segments of gun metal are mounted ohn a bakelite base. The multi brush sweeping contacts move over either segment with a handle. Brass terminals are provided for the four segments and on the contact block.

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Plug Key Commutator 6 Way Circular (1104 A )

6 way circular, with extra heavy blocks.

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Plug Key Commutator 4 Way Circular (1104 )

The brass block is mounted on thick bakelite plate. The plug and lugs are throughly interlaped for perfect locking. Terminals are provided on each segment with extra heavy blocks.

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Tapping Key Double Contact (1105 A)

Two brass strip (nickel plated) and four terminals mounted on a bakelite plate of high insulation

Contact Resistance

: 2 milli ohm approx.

Maximum Current

: 5 Amps



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Tapping Key Single Contact (1105)

Brass strip (nickel plated) with insulated knob and terminals mounted on a bakelite plate of high insulation.

Contact Resistance

: 2 milli ohm approx.

Maximum Current

: 5 Amps



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D.P.D.T. Switch (1105 )

Machine moulded on wooden base with brass terminals. This is a 5 Amp double pole double throw knife switch wired to reverse the current when the handle is thrown from one side to the other.

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Spare Scale for Lamp and Scale Outfit (1107 D )

Spare translucent perspex scale graduated in 25-0-25 cm and 0-50 is provided.

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Spare Bulb (1107 C )

Spare auto bulb 6 V, 20 W which is used in lamp & scale of cat. No. 1107 &1107A.

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Lamp and Scale Workable on main (1107 B )

Suitable for use with reflecting galvanometer with rack and pinion arrangement workable on 220 volts A.C./D.C. Complete with scale and its attachment plug and cord.

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Lamp and Scale Outfit (1107 A )

The lamp house is of cast aluminum, machine turned and finished in a pleasing duco paint. The lamp house is fitted with 6 volts 20 watt bulb through built in transformer works on a 220 volts A.C. Mains. A translucent perspex scale graduated in 25-0-25 cm and 0-50 cm is used in this unit. Complete on a heavy cast iron stand with adjustable brackets for lamp house which is divided into 25 cm 0-50 cm is used in this unit. Complete on a heavy cast iron stand with adjustable brackets for lamp house and scale with cord and pin plug.

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Lamp and Scale Arrangement (1107 )

It is based on ‘GRIFFEN’ pattern which is highly suitable for reflecting ‘PSAW’ ballistic galvanometers. It consist of a heavy steel cabinet made from S.W.G. 20 sheet of size 6” x 4” x 3 ˝ with printed aluminum panel on the top. In this steel cabinet, a step down transformer of 6 volts, 3.5 Amps is enclosed, which is suitable for the lamp house. The lamp house is made from aluminum - silver alloys, machined and finished in a pleasing duco paint. It is fitted with a special 6 volts 20 watt bul which is connected to the transformer with a special male - female detachable plug. The lamp house is fitted with rack and pinion arrangement for focussing. A double convex lens made from imported glass of 18 mm dia. of 4” focal length is used in it for better results. The lamp house can slide up and down along the vertical rod fixed on a detachable box. The inclination of the lamp can be adjusted in vertical plane. Bright light through the convex lens falls on the concave mirror of the ‘PSAW’ ballistic perspex scale fitted in a special bracket above the lamp house which is divided into 25-0-25 cm and 0 to 50 cm.

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Latent Heat of Steam Apparatus (1108 )


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LENSES SET OF SIX. (1109 C )

50mm dia. with ground and polished faces and ground edges. One each of the following shapes. Double convex, plano convex, converging concave, convex, diverging concave-convex, double concave, plano concave. Supplied in a velvet lined box. Cat. No. 1109C/1 As above but 75mm dia. Cat. No. 1109C/2 As above but 38mm dia.

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LENSES DOUBLE CONCAVE (1109 B)

Spherical, optically worked glass, with ground edges highly polished.

Dia
in mm

Dimension in mm

38

FL50

100

150

200

250

300

500

1000

50

FL50

100

150

200

250

300

500

1000

75

FL100

150

150

200

250

300

500

1000

100

FL150

200

250

300

500

1000


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LENSES DOUBLE CONVEX. (1109 A)

Spherical optically worked glass, with ground edges highly polished.

Dia
in mm

Dimension in mm

38

FL50

100

150

200

250

300

500

1000

50

FL50

100

150

200

250

300

500

1000

75

FL100

150

150

200

250

300

500

1000

100

FL150

150

200

250

300

500

 

1000


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LENSES DOUBLE CONVEX (1110 VEX)

Spherical optically worked glass, with ground edges highly polished.

Dia
in mm

Dimension in mm

38

FL50

100

150

200

250

300

500

1000

50

FL50

100

150

200

250

300

500

1000

75

FL100

150

200

250

300

500

--

1000

100

FL150

150

200

250

300

500

--

1000


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