Door Contact Sensor

4275 door contact sensor products are offered for sale by suppliers on Alibaba.com, of which alarm systems accounts for 38%, magnetic sensors accounts for 4%, and other sensors accounts for 1%. A wide variety of door contact sensor options are available to you, such as hotel, for business and household.You can also choose from wifi, remote control and voice control door contact sensor,as well as from home security system, fire, and door door contact sensor,And whether door contact sensor is battery, {2}, or {3}.