Magnetic Measurement, Gaussmeter, Multifunction Calibrator manufacturer / supplier in China, offering Current Coil 50 Turns 100 Turns for Clamp Meter Calibration TUNKIA TD1020, TUNKIA TD1020 50T 100T Current Coil for Clamp Meter Calibration with Multifunction Calibrator, TUNKIA TD1870 Multifunction Calibrator for 5.5 DMM and Clamp Meter Calibration and so on.