Easy to Use Alarm for Household Doors Waterproof High Sensing Distance
ab 11,26 €
Working principle, normally closed: When no magnet or magnets stay away from the magnetic switch, the magnetic switch is cut off. When the magnet is close to the magnetic switch and can inducts it, the magnetic switch is connected; When the magnet is close to the magnetic switch and can be induced, the magnetic switch is cut off.
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