A simple instrument to teach student the techniques and method of e.m.f. measurement, fitted on nicely polished plywood base with sunmica top, solf wood gradutated scale 100 cmx 1 mm, resistance wire is streched along the ends of meter scale, brass CP connecting strips and brass terminals, provided with pencil jockey. Avaialble : 4 Wire / 10 Wire
The slide wire 50 cm long is fitted over graduated plate divided in 500 part. The jockey is of superior type and slides on the metal rod. The dial consists of 14 coils connected in series to the slide wire. Terminals for battery, galvanometer and test circuit are provided on the panel.
Consisting of heat treated winding of the purest form of platinum having resistance of 2.8 ohms, enclosed in aborosilicate glass grounded tube, provided with four terminal, tow for non inductive winding and two for conpensating leads.
(Wheatstone Bridge) One meter long, provided with four gaps/ two gaps, plywood base and sunmica top, graduated scales, constantan wire is streched on top of meter scale brass C.P. Strip aend gaps can be closed by removable brass strips and brass terminals are provided to reduce resistance. With Pencil Jockey With pressing Jockey Brass
Callender and Griffith’s Bridge, Carry Faster Bridge and Potentionmeter combined in one instrument. It is an improvement over the potentiomenter. 50 cm long slide wire of 1 ohms resistance is calibrated into 100 equal parts. 14 coils are arranged in series in dial form each being of 1 ohms resistance, terminals arranged for appropriate working of different instruments, jockey sliding on brass rod, accuracy of adjustment ± 0.05 %
For comparision of capacities of condenser. it consists of an AC source, a detector, 5 unknown values, Circuit diagram is printed on board and 2 ratio dials of X10 & X100 are provided Accuracy ± 0.05 % to ± 0.1 %
It is fully portable with build in galvanometer and battery, designed to provide an accurate and sensitive measurement of resistance and locating faults in cables by adopting the Murray and Varley loop circuit for tests. Separate terminals for current, battery and galvanometer are provided on bakelite panel. Range : 0.001 ohms to 11.11 megohms Constantan coil, accuracy ±0.1 %
For precise measurement of low resistance, capable of measuring resistance from 0.1 micro ohm to 1.1 ohms. Ten standard resistance fo manganin are provided in steps of 0.01 oh each in dia form with five multiply ratio of 0.001, 0.01, 0.1, 1 and 10 ohms. Ther circular slide wire of 0.01 ohms is also made from thick manganin wire having extremely low temperature coefficient. Calibrated to ± 0.05 to 0.02 % with heavy construction.
Same as 633, Range - Miliammeter - 100 mA, 250 mA, 500 mA etc. Range - Microammter 50 uA, 100 uA, 250 uA and 500 uA
3½ Digit Display with 9 volt battery. Range Avilable DC Current - 199.99uA 1.99mA 19.99mA 199.9mA. 19.99 A DC Voltage - 199.9mv 1.99V 19.99V 199.9V
The demostration meter is used to demostrate the working principle of AC and DC Ammeter, Voltmeter and Galvanometer with the help of interchangeable plastic Scales. Amagnetically damped spring controlled moving coil movement is housed in a plasic case with glass front and rear panel. A pair of 4 mm socket terminals is give on the right side to apply voltage and current. A special locking arrangement and a centrl / side zero adjustment control is given on the left side with the help of two knobs. The interchageable scales are boldy marked on both sides enabling the class to view from the front and the demostrator from the rear. Each scale is fitted through a slot on the right side of the case and has a plug connector which also serves to locate and align the scale positively in position. Locking system is provided to lock the pointer to aovid damage is transist. Basic Movememt : 5mA - 100 m V F.S.D. Scale Lenght : 200 mm approx. Accuracy : ± 2.5 % F.S.D. Dimensions : 300 x 150 x 300 mm approx. Weight : 2 kgs. approx. Supplied with three standard scales.
A multi range instrument for measurement of voltage, current and resistance. Moving coil meter having red pointer over two colour scale. Complete with test leads, probes and internal battery.
Having standard winding of 2-5-50 or 2,50,500. The bakelite ring with winding it mounted on bakelite base with four terminals. No. of turns is marked betwee the terminals. Th whole assembley rotates on a non magetic tripod base with non magnetic levling screw, Compass box is mounted on non- magetic metallic cup and is free to roated around it. Compass box is graduated in degrees. Avaialbe in Alumminu Parts / Brass Parts
To dtermine the variation of magnetic field along the axis of a coil, a circular non magnetic frame has copper wire wound on it. The ends of wire are connected to terminals on wooden board. Aluminium rods are graduated upto 50 cm on both sides. A permanent magnet compass siting on a non magnetic platform travels on alumimium rod.
Suitable for use with ballistic galvanometer, provided with 6 volt step down transformer, 6V / 20 W lamp housed in metal container, a translucent perspex scale attachment graduated in 25-0-25 or 0-50 cm plug and cord
Higly sensitive instrument to be used as null detector in wheatstone bridge and potentiometer experiments, with built in lamp and scale arrangement in bakelite case, a sensitive moving coil system is suspended in a taut band manner in a uniform field of permament magnet. Zero adjustment knob is provoed to set spot of light. time period app 1.58 second working on 220 V AC available in two different coil resistance. Available : 100 / 600 ohms
Fitted on board with banana socket and circuit diagram
Fitted on board with banana socket and circuit diagram
Fitted on board with banana socket and circuit diagram
Mounted on board with banana socket and circuit diagram
