Portable Wheatstone Bridge

Model No. ETK0020

Description
This bridge is fully portable with a built in sensitive Galvanometer and a dry battery. The bridge is extremely useful for resistance measurements with a fair degree of precision.
Series Arm : 
• There are 4 decades of 10 x 1, 10 x 10, 10 x 100 and 10 x 1000 ohms.
Range Multiplier : 
• A single rotary switch furnishes 7 range multipliers of x 1000, x100, x10, x1, x0.1, 0.01 and 0.001.
Range of Measurement : 
• Ohm to 1.11 mega ohms.
Battery : 
• A dry battery of 4.5 volts is built-in provision is there for using external battery for measuring high resistances.
Galvanometer : 
The bridge can be supplied with types of built-in galvanometer.Student galvanometer of M.O. 65 model, and of sensitivity 10 microamperes/mm.Taut suspension galvanometer of coil resistance 100 ohmsand sensitivity of 0-5 microampere per mm and with a mechanical coil locking device and a zero adjuster.In both models, external more sensitive galvanometer such as our spot reflecting galvanometer as above can be use for greater discrimination and accurate null point.
Resistance Coil : 
• Manganin coil which are non inductivity wound, aged and properly varnished are used.
Push Button : 
• 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%
• With Students galvanometer of M.O. 65 model
• With Taut suspension galvanometer.   

 
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