It could test the surface field of permanent materials and working magnetic field of dc motor, amplifier, magnetic separator and permanent de-ironing separator. It also could be used in the measurement of 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 1. Small and light, easy to take, could meet all kind of on-site test requirements. 2. Power down automatically when no operation over 40 seconds.Lower voltage indicate.Super low power consumption design.It could be used more than 80 hours continuously. 3. Dc or ac peak hold 4. Dc and ac magnetic field, two range 0-200mt, 0-2000mt. 5. Dc field polarity judgement function. 6. One-click quick automatic zero adjustment. 7. Users can select the transverse and Longitudinal probes accordingly. Power 9v laminated cell inside Display 3.5 digits lcd Test range 0~~200mt, 0~~2000 mt Basic error: ~{!@~}1% Resolution Dc~{!a~}1 range: 0.00~~200.00mt, resolution: 0.01mt Dc~{!a~}10 range: 0.00~~2000.00mt, resolution: 0.01mt Ac~{!a~}1 range: 0.00~~200.00mt, resolution: 0.01mt Ac~{!a~}10 range: 0.00~~2000.00mt, resolution: 0.01mt Ac magnetic field frequency range below 400hz Temperature error -0.06%/~{!c~}c Operation environment Temperature : -10~{!c~}c~~40~{!c~}c, humidity: 35~~75% Probe interface 5 pin socket 0.5 kg . Plastic package l 150 x w 70 x h 25 mm