Electrical & Electronic Testing Devices

Our product range contains a wide range of Precision Kelvin Double Bridge, Industrial Kelvin Bridge, Schering Bridge, Portable Wheatstone Bridge and Mobile Phone Trainer

Precision Kelvin Double Bridge

We offer precision kelvin double bridge.Usage : it is a precision bridge for the measurement of low resistance. Basic structure : a bakelite panel enclosed in a teak wood box is used. Separate current and potential terminals, push buttons for battery and galvanometer terminalsrange of measurement : 1.1 to 0.00002 ohms. Maximum current : 2 amperes. Accuracy : + 0.1%. Multiplying ratios : a single rotary switch furnishes 3 multiplying ratios of x1, x0.1 and x0.01. Standard resistance : 10 coils of 0.1 ohm each are arranged on a rotary dial and a circular slide wire of total resistance 0.1 ohm and of 500 sub-divisions is equal to 0.0002 ohm on the normal range

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Industrial Kelvin Bridge

We offer industrial kelvin bridgeusage : this bridge is very suitable for the use of wires and cables manufacturers. It is being extensively used for finding the resistance of transformer windings, contact resistance of relays etc.Basic structure : terminals for battery, galvanometer, current and potential terminals are all provided on the bakelite panel enclosed in a teak wood box. Range of measurement : the bridge has a range of 0.2 micro ohm to 11ohms. Maximum current : 10 amperes intermittently and 5 amperes continuously.accuracy : + 0.05% + 1 small division of the slide wiremultiplying ratios : a rotary switch furnishes 5 multiplying ratios of x100, x10, x1, x0.1 and x0.01.Standard resistance : there are 10 coils of 0.01 ohm each arranged on a rotary dial plus a circular slide wire of total resistance 0.01 ohm and 500 sub-divisions. Each sub-division is equal to 0.00002 ohms on the normal range. Current reversing switch : a battery reversing switch is provided to reverse the current in the bridge to eliminate thermal effects.

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Schering Bridge

We are offering schering bridgep= r1=consists of ratio dials of 1, 10, 100 and 1000 ohmsr2=consists of ratio dials of 1, 10, 100 and 1000 ohmsc1 = gang capacitor of 500pf.Q = in this arm c1 is placed parallel with r2 to form 2nd arm cdr = c3= consists of three dial condenser box of 0.001x10, 0.01x10 & 0.1x10mfd.R = consists of three dial resistance box of 1x10, 10x10, 100x100 ohms.Unknown capacitor c1 whose value is to calculated is connected in series with r to form 4th arm sterminal for headphone, unknown capacitor & oscillator for provided.

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Portable Wheatstone Bridge

We offer portable wheatstone bridgefor precision resistance measurements. Built in : sensitive galvanometer (10 u amps) and a dry battery 4.5 volts. Series arm : there are 4 decades of 10x1, 10x10, 10x100 & 10x1000 ohms. Range 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. Range of measurement : 0.001 ohm to 11.1 meg-ohms. Provision for using external battery provided. Accuracy : better than 0.05%galvanometer : is provided push buttons : two push buttons for battery & galvanometer

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