Physics Instruments

Unmounted spare glass tube with a third short limb for connecting a suction tube.
a) Graduated
b) Ungraduated

For comparing the densities of liquids by measuring the heights of two columns of liquid produced by applying suction to theshort center limb. Compeising three limbed glass tube mounted on polished wooden stand with meter scale 45 cm long with ‘0’ at the bottom. The scale is divided in centimeters and millimeters. Supplied w/o rubber tube and pinch cock.

For use as a manometer. It consists of a superior quality wooden stand fitted with wooden meter scale which is 0 to 45 cm from the bottom. Provided with small metal strips for supporting U- Tube.

It consists of a hollow cylindrical brass tube open at both ends provided with a small chuck (torsion head) in the middle of which is fixed a plane mirror. The length of the hollow brass tube is 40cm, dia 18cm and graduated with scale divided in millimeters on both sides from 0 to 15cm and with vernier to read 0.05mm. Two solid brass cylinders and two hollow brass cylinders, all of length 10cm long are provided so that when put end to end, they fill the hollow tube completely. Supplied with superior quality clamp.

Other specification are same as Cat. No. 1125 but on a sturdy streamlined base with provision for horizontal or vertical views.

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 .

Specifications are same as per cat. no. 375 but its size is smaller than the size of wooden box for sodium vapour lamp.

An 80 W choke of excellent quality is clamped on a heavy steel cabinet. An anchor make piano type switch ad 5 - pin socket is provided for on / off and output respectively.

Designed exactly as per ZEAL. Supplied with PSAW trade mark only.

Comprising two thermometers on plastic frame graduated -10 to 50DC, One thermometer bulb is covered with muslin wick connected to a water reservoir, which keeps it moist

This durable non-rusting, all metal gauge consists of a funnel 4" in dia fitting into the top of cylindrical vessel of the same diameter. When the inner tube is removed, the outer case serves as an overflow container, (a) G.!. Sheet (b) Brass Sheet (c) Copper Sheet

This bridge is exactly same as cat. no. 189 except for additional facility of murray and varley loop test for location of faults in cables. The bridge is also suitable for resistance measurements.
For resistance measurements and varley loop test, there are 7 multiplying factors of x 1000, x 100, x 10, x 0.1, x 0.01 and 0.001.
For murray loop tests, 3 additional multiplying factors of 10 m, 100 m and 1000 m are provided.
Special switching arrangement has been provided to carry out conductance tests, varley loop test and murray loop test.
Rest of the features like series arm, battery, galvo, push buttons are same as in cat. No. 1128 C.
A) Constantan Coil : Accuracy ± 0.1%.
B) Manganin Coil : Accuracy ± 0.02%.

General : This bridge is fully portable with a built in sensitive galvanometer and a dry battery.
Series Arm : There are 4 decades of 10 x 1, 10 x 10, 10 x 100 and 10 x 1000 ohms.
Range of Multipliers : A single rotary switch furnishes 7 range multipliers of x 1000, x 100, x 10, x 1, x 0.1, x 0.01 and x 0.001.
Battery : A built in dry battery of 4.5 V. There is a provision for using external battery for masuring high resistances.
Galvanometer: A delux galvanometer of MR 100 model, with sensitivity 10 microamperes / div. Is used.
Push Buttons: Two push buttons for battery and galvanometer are provided.
Accuracy: Both series and ratio coils are adjusted to an accuracy of better than 0.05%.
Overall accuracy of measurements is better than ± 0.1%.
A) Constantan Coil : Accuracy ± 0.1%.
B) Manganin Coil : Accuracy ± 0.02%.

Other specifications are same as that of Cat No. 1128 A. Pencil jockey, is replaced by superior quality spring type Brass sliding jockey which moves on a metal rod. The brass strips are fitted on a laminated board.

The four gap bridge has a large and heavy copper strip of (SWG) No. 18) mounted on a heavy 3/4”thick laminated base of size 44”x 4” x 3/4”. /nine heavy brass terminals lock type are provided to reduce the resistance to a minimum . The ends gaps are closed by removable brass binding pieces which are held in position by the terminals. The 24 SWG constantan wire is stretched along the top of wooden meter scale and securely clamped to the brass end strips so that end errors are negligible. Supplied complete with pencil jockey along with lead for connections. .