"PAN Magnetfinder - magnetic field tester + LED torchA blue LED and an alarm tone indicate a magnetic fieldFor permanent magnets and electromagnets (DC and AC)For testing electromagnets, electric motors, solenoid valves, relays, contactors, conventional transformers etc.
LED torchFully insulated, no metallic contact Technical dataDimensions of device: 163 x 21 x 26 mmWeight (gross/net) 118/29 gRequired battery(s): 2 x 1.5 V AAA "