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Magnetic pole detector is a fast, easy and secure tool for checking the polarity on a magnet. Just point the nose against the magnet where you want to find out the polarity, press the button to see the result.A green LED indicates S and a red LED indicates N.It is a very convenient professional device in identifying magnetic filed direction with 100% accuracy. For more detail info, please feel free to visit our website or inquire us at any of your convenience.
