Magnetic Overhead Garage Door Alarm Sensor With L Bracket Waterproof Epoxy Sealed Zinc Alloy Case Adjustable Fit For Wide Door Channel Industrial And Residential Use Easy Install Door Contact Switch

Waterproof Zinc Alloy Overhead Garage Door Alarm Sensor
✔️ Adjustable NC reed switch, epoxy sealed, L-bracket fit for doors

This magnetic door sensor is designed for overhead garage doors and industrial doors with wide channels. It uses a reed switch paired with a magnet to detect door position, triggering alerts when the door opens or closes.

✅ NC normally closed contact type for reliable alarm trigger
✅ Reed switch and magnet for door state detection
✅ Epoxy sealed waterproof zinc alloy case with aluminum L-bracket
✅ Adjustable to fit wide door channels via surface mounting
✅ Operation gap ≥ 50 mm; max voltage 28V DC, max current 0.2A, max load 3W
✅ Pack: 1 pair per bag; color: silver-grey

💡 What is a magnetic overhead door sensor used for in industrial and residential setups?

This handy door contact switch helps monitor door state and trigger alarms. - monitor door position for security systems - NC normally closed configuration simplifies wiring - waterproof epoxy sealed housing stands up to outdoor use - adjustable L-bracket ensures fit for wide door channels