The door contact sensor is a magnetic field electrical switch that provides a high-pitched alarm when someone opens a door or window when it is closed, thus protecting your home.SpecificationColor: WhiteMaterial: ABSSize: Cable Length:Maximum Current: 0.5AMaximum Voltage: 0-100VSensing Distance: 15-25 mm / 0.59-0.98 inchMagnetic Sensor 1: 5 x 1.4 cm / 1.97 x 0.55 inchMagnetic Sensor 2: 5 x 1.4 cm / 1.97 x 0.55 inchPacking List: 5 x Surface Mount Wired Door ContactAdvantageRust-proof Material - The wired contact sensor is made of rust-proof and durable zinc alloy, with sensitive response of magnetism and can be used for a long time.Wide Application - Rolling door contactor is very suitable for places where you need magnetic alarm, such as home, garage entry and exit, office, dormitory, hotel room, mobile home, industrial warehouse, etc.
eBay