Magnetic Pole Detector

The Thyssen Magnetic Pole Detector is a rugged and practical tool used to test magnetic fields. Just place the sensor end of the pen shaped tester close to a magnet and press the button. If a field is detected the buzzer will sound and the red (North) LED or the green (South) LED will light up accordingly. The field strength must be greater than 150 Gauss for the detector to work. Batteries and instructions are included.