Extech MD10  

MD10: Non-contact Magnet Detector with Built-In Flashlight

Detect the Presence of a Magnetic Field including AC, DC and Permanent Magnets

The MD10 is a non-contact magnet detector with built in flashlight. A Blue LED lights up indicating the presence of a magnetic field including AC, DC and permanent magnets without contact. Applications include, testing audio speakers, Troubleshoot solenoid valves in pneumatic and hydraulic control equipment, testing relays with coils and electrically controlled solenoid valves in vehicles and machinery. Complete with two AAA batteries.