12Sets NO Switch Magnetic Mount Wired Alarm Window Door Contact Sensor Detector Reed Recessed Alarm Security System Normally Open RC36

Designed for use with alarm systems. Great for use in family and factory window, door. etc. Working Principle: When the magnet together, the circuit is conductive( light off ); when the magnet separate, the circuit is not conductive ( light on) Note: 1.When installing, Do not give the switch too large Impact force 2.Strong magnetic field and high current environment, Avoid using it 3.Wiring can not be directly connected to the power supply 4.The load voltage and the maximum load current must not exceed the maximum allowable amount of the switch,Affect its service life 5.Don't place the switch in water or coolant