Specification: Max. Current: 0.5A, Each Size(Approx): 27 x 14 x 7.5mm / 1.06-inch x 0.55-inch x 0.3-inch (L*W*H).
Application: These are the door contact sensors that are in use with any and all commercial or residential card access systems as well as all burglar alarm system. Work as an anti-theft alarm, ideal for metal door and window.
Note: Door magnetic induction can only provide a switch signal, which can not directly load the power, nor directly connect the lamp!
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 ). 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!
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