Door Magnet Contact Switch Alarm

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Wired Magnetic Door/Window Contact Sensor

Item No.: BTD-38
This sensor is essentially a reed switch, encased in a plastic shell. Normally the reed switch is 'open' (no connection between the two wires). The other half is a magnet. When the magnet is less than 13mm (0.5") away, the reed switch closes. They're ofte
Working distance: 15-25mm
Fixed way: with a strong double-sided primer, with screw placement
Switch form: NC - normally closed (open circuit alarm)
Current / voltage / power: 0.5A / 100V / 10W
Packing: 20 sets / bag