10 Sets Pack of Wired Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape

Price: $15.99
(as of Oct 17, 2026 16:43:38 UTC – Details)


Product name: Surface mounted magnetic contacts
Suitable: wooden / glass / plastic doors
Mounting type: Surface mounted with double side tape
Operation gap: ≥15mm(Non-magnetic environment test)
Connecting type: Screws terminals
Material: ABS plastic
Contact type : NC (normally closed), switch OFF when door is opened
Max. Switching voltage: 28V DC
Max. current : 0.2A
Max. load : 3W
Suitable for wooden/glass/plastic material doors
For home burglar alarm system, important kits of home security.
Screws terminal connection inside , easy for mounting and connecting to systems.
Surface mounted with double side tape , ≥ 15mm operation gap(Non-magnetic environment test)
NC type , normally closed : Switching OFF when door is opened
Customers find these alarm sensors to be good value for money. However, the magnetic strength receives negative feedback, with multiple customers reporting that the magnets barely stick together. Moreover, reliability and quality are mixed aspects – while some customers say they work great and are good replacements, others report failures within the first month and poor quality. Additionally, compatibility is also mixed, with one customer noting they work well with their ADT setup.