... remnant magnetism of mechanical processing, magnetic polarity, remnant demagnetizing field of products, to control the magnetic condition of electroplating staffs ... and test the motor magnetism, leakage of electromagnetic field and AC space field.Main features. Small and light, easy to ... range: 0.00~2000.00mT, Resolution: 1mT AC magnetic field frequency range below 400Hz Temperature error -0.06%/°C ...