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Polarity tester

Polarity tester

Polarity testers are used to determine the polarity of magnetic fields. They are able to check the direction of magnetization and also indicate whether a magnetic field is present. These hand-held testers work mechanically or electronically. The pole is easily determined by applying a sensor to a magnet. Permanent magnets display the North pole or South pole. Polarity testers are used for testing coils or in the production of electric motors, for example.

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