RESALET 2 Sets Magnetic Reed Switch Alarm NC Normally Closed Surface Mount Wired Contact Sensor for Gate Garage Window Door Security System Silver Gray MC 51

Description: 1.These are the door contact sensors that are in use with any and all commercial or residential card access systems as well as all security burglar alarm system. Great for use in family and factory window, door. etc. 2.Work as an anti-theft alarm, ideal for wood door and window. 3.NO means Normally Open: when the magnet separate, the circuit is conductive( light on );When the magnet together, the circuit is not conductive ( light off ).When make order,pls check carefully! 4.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! Specification: Product Name: Magnetic Door Switch Model: MC-51 Contact Type: NC Actuation Distance: 20-30mm Max. Current: 0.5A Max. Power: 10W Working Voltage: DC100V Size(Approx):  31.5 x 14.7 x 7.5mm / 1.24 x 0.58 x 0.3 inch (L*W*H)  Hole Dia.: 3.2mm Cable Length(Each): 26cm / 10.2-inch Material: Zinc Alloy (Housing) Wire Type: 1007UL#22AWG Color: Silver Gray Net Weight: 85g   Package Content: 2sets x Magnetic Door Switch   Note: Door magnetic induction can only provide a switch signal to the device, which can not directly load the power, nor directly connect the lamp!