Standard Resistance in steps of 0.01 ohm in series with a calibratedslidewirs 

100 divisions equal to 0.01, ohms Rotary type multiplier switch 0.01, 

0.1, 1, 10 and 100 gives a range of measurement 0.000001 to 1.1 ohm.

Industrial Kelvin Double Bridge:

Standard resistance :

There are 10 coils of 0.01 ohm each arranged on rotary dial plus a circular slidewire of total resistance 0.01 ohm and 500 sub divisions. Each sub-divison is equal to 0.00002 ohms on the normal range.

Conductivity attachment :- 

It is an arrangement to hold Specimens in the form of wires rods, strips etc. Distance between potential points is 500 mms, potential terminals are provided.

Multiplying Ratio :- 

• A single rotary switch furnishes 3 multiplying ratios of x1, x0.1 and x0.01

Range of Measurement :-

• 1 to 0.00001 ohms on different ranges.

• Maximum Current :     2 amperes

• Panel :-    A backlite panel enclosed in a teak wood box is used, Separate current and potential terminals, battery and galvanometer terminals, push buttons for battery and galvanometer are provided on the panel.

• Accuracy :- + 0.1%

• Coils :- Manganin Coils are used