Ammeter Dealers in Ambala City, Ambala

  The plastic ring or bobbin 162.5 mm overall diameter would with three coil of insulated copper wire with 2,50 and 500 turns mounted on Bakelite moulded platform fitted with 4 terminals, rotating on a tripod non magnetic metal base, supported by leveling screws. Complete with compass box (Magnetometer) mounted at the centre of the ring