Moving coil instruments are offered by mumbai-based shanti electric instruments. These moving coil instruments are provided with built-in transducer, which are used for frequency measurement. Some technical specifications of these moving coil instruments include:these frequency measuring instruments are available in sizes 72 mm x 72 mm and 96 mm x 96 mm. Measured quantity: frequency for all types of networks. These can measure voltage of 57.7- 500 v and frequency of 45-440 hz. Proof voltage is 2 kv ac. Weight [approx in kg] 72 x 72 = 0.25 kg and 96 x 96 = 0.30 kg.
