4pcs Recessed NC Security Alarm Door Window Contacts Sensor Magnetic Reed Switch

NC means Normally Closed:When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ). When make order,pls check carefully! The reed switch is an electrical switch operated by an applied magnetic field. Designed for use with alarm systems. Great for use in family and factory window, door. etc.

Voltage : 100V;Rated Power : 10W;Actuation Distance : 0-15mm Cable Length : 33cm/13";Size(Approx) : 2.3 x 2.3cm/ 0.9" x 0.9"(D*H) Color : Brown;Housing Material : ABS Weight : 64g;package Content : 4 xMagnetic Door Switch