Physics Instruments

Size a) 4" b) 6"

Size a) 2" b) 3" c) 4"

Size a) 2" b) 3" c) 4"

Same as above but with an improvement that the telescope and collimator are held in support rigidly and in perfect alignment. Vertical adjusting screws are provided to both the telescope and collimator. Clamping devices are provided to lock the telescope and collimator after adjustment.

The specification is similar to cat. no. 1242 B 7” instrument for degree colleges and in tecnical labs. Life time 178 mm stainless steel scale and verniers, calibrated on the latest dividing machine to give maximum accuracy. In our 7” spectrometer we provide special circular slit to the collimator. The slit of the collimator is from close grained stainless steel and slit jaws are finished and ground with the utmost care and optically tested for the accuracy of the edges. The two jaws are operated by a knurled ring and moves symmetrically from the centre and remain parallel at all openings. Supplied in a superior quality wooden box.

For circular slit to 6” spectrometer listed above in cat. no. 362 & 363 . Please add extra.

Specifications are same as above, only fine adjustment to the telescope and collimator tubes are provided laterally as well as vertically. This system is manufacture in 6” spectrometer only and provided with stainless steel scale. Size 6”.

This instrument while robots enough for individual student use is also intended for more advanced work. The spectrometer consists of a telescope and a collimator mounted on a stable heavy base. A circular scale is provided with verniers to read the position of telescope in degrees. In the center is a prism table made of brass on which prism or diffraction grating can be clamped.

Cat. No.	Protected Circle Brass Scale
1)	12.5 cm
2)	15.0 cm

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This is a robotic instrument designed specifically for students use but which nevertheless is capable of a very high performance. The main structure is a cast iron base with leveling screws, with two opposite verniers. The lenses of collimator and telescope are achromatic. Good quality ramsden eye piece with cross wire is used. Supplied in a well polished wooden case.

Cat. No.	Protected circle Brass scale S.S. Scale
1)	15.0 cm
2)	17.5 cm

If one end of a long flat spiral spring is fixed and the lower end is pulled by a short jerk and released, longitudinal waves are produced. The apparatus consists of a spiral spring about 25 mm dia and 10 cm length. The upper end of the spring is suspended from a chucknut and the lower end is provided with a small pointer which moves over a vertical wooden meter scale. The lower end is also provided with hook for carrying weights. All this set up is provided on a heavy metal base, supplied with weights.

Design for use as a standard, stable voltage reference source in such applications as standardisation of potentiometers, instruments calibrations, temperature & voltage measurements & pH testing etc. Housed in small steel cabinet giving e.m.f. Of 1.0186 volts accurate between 10 deg. To 40 deg. C temperature.

Copper Cylindrical body with conical top and short neck for bung. Fitted with steam outlet tube riffled for rubber tubing.
A. Cap. 1 liter
B. Cap. 2 liter
C. Cap. 3 liter

Comprising a blackened hollow hemisphere about 2Scm dia, fitted in a wooden board lines with tin, and a steam chamber above the hemisphere to measure them an uniform temperature by passing steam through it recorded by two thermometers Heavy silver disc soldered at bottom to copper Constantan thermocouple housed in Ebonite tube with lid Engraved on ebonite tubeare Disc constants, mass and Area. Complete with one extra similar thermocouple for calibration is supplied.

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Smith type, encased in a metal case with fly-back action. At the right side of the case is the stop and start lever, the operation of which enables a timer to be started and stopped as desired. On the other side of the case is a press lever which returns the hands to zero, after the mechanism has been stopped by means of a stop lever. A subsidiary dial recording 0 to 60 minutes is provided below the second hand. Least Count : 1 second

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To overcome the difficulties experienced in mechanical stop a clock, PSAW has introduced Quartz controlled 3 ½ digit stop clock. The START/STOP operation is by means of a mini toggle switch and RESET by a push button. RESET is possible only in STOP mode to avoid accidental resetting while the clock is running.
Specifications :
Range: 999 sec.
Resolution: 0.1 sec.
Accuracy : +- 0.1% (Quartz controlled)
Display : 12.5 mm Bright seven segment display
Working Voltage : 230 volts A.C. +- 10%
Reset : by push Button
Least Count : 1 second