Round Magnetic Door Switch (Reed Sensor) for Home Security
Currently unavailable
No store has this product in stock right now. Prices below are the last ones we recorded.
Prices updated: 12 Oct 2026
Price history
Lowest daily price, last 90 days
Not enough price history yet.
About this product
A round magnetic door switch made of a reed switch and a magnet. The contacts close when the magnet is near the sensor and open when the door or window moves away, triggering a home security alarm. The magnet mounts on the door and the switch on the frame.
Specifications
- Type
- Reed switch with magnet
- Max switch current
- 1.0 A
- Voltage
- 110-220V
- Actuation distance
- 15-25 mm
- Housing
- ABS
Frequently asked questions
How should the magnet and switch be mounted?
Mount the magnet on the moving door and the switch on the fixed frame, so they sit close together when the door is closed, within the 15-25 mm actuation distance.
How is it wired to an alarm?
Connect the two signal wires of the switch to an alarm zone input. The switch works as a simple contact, so the alarm reads the door as closed or open.
