Mecion 12Pcs NC Surface Mount Wired Window Door Contact Sensor, ABS Door Window Sensor Alarm Magnetic Reed Switch

Great for use in family and factory wooden windows, doors. etc. Warm Tips 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! This contact can't connect directly to power, it works with your alarm system provide a switch signal. Specification Contact Type: NC, Normally Close Contact Capacity: 0.5A(Maximum Switch Current) Voltage Power: 10W Gap: 15mm-25mm Each Size(Approx): 64 x 20 x 13mm / 2.5" x 0.8" x 0.51"(L*W*H) Mounting Hole Dia: 4mm/ 0.16" Color: White Housing Material: ABS