Spot Galvanometer

High sensitivity, very useful as null detector. Housed in sturdy plastic case with in-built lamp and scale arrangement, taut band type movement, with Alcomax magnet, clamp and free arrangement for safe transportation, easy replacement of the 6V lamp, working on 220V a.c. with internal transformer. With a rotary switch for selecting any of the five shunt powers 1, 1/10, 1/100, 1/1000, and short circuit.
Galvanometer resistance :125 ohms
Current per mm deflection :5 x 10-8
Volts per mm deflection :6.25 x 10-6
Critical damping resistance :1000 ohms