SKU: 191205003491
Brand : Made in China
Warranty : 3 Days
৳ 160.04
Category: Switch & Button
The Magnetic Door Contact Reed Switch 27mm is a compact Normally Open (NO) magnetic sensor designed to detect the open or closed status of wooden doors and windows. It includes a reed switch sensor with a matching magnet to create a simple and reliable open/close detection system.
When the door or window is closed, the magnet stays near the sensor and the circuit closes. When the door or window opens, the magnet moves away and the circuit opens. This status change can be detected by a compatible alarm panel, controller, smart-home system, or DIY electronics project.
Its compact size, 300mm wire lead, and flexible mounting options make it suitable for home security, access monitoring, Arduino, ESP32, Raspberry Pi, and automation projects.
| Parameter | Value |
|---|---|
| Product Type | Magnetic Door Contact Reed Switch |
| Contact Type | Normally Open (NO) |
| Switch Pattern | Normally Open |
| Color | White |
| Material | ABS |
| Dimensions | 27mm × 14mm × 8mm |
| Maximum Switching Current | 500mA |
| Maximum Switching Voltage | DC 100V |
| Rated Power | 10W |
| Actuation Distance | 8–10mm |
| Wire Lead | 22 AWG, Approx. 300mm |
| Mounting Method | Screws or Double-Sided Tape |
| Recommended Application | Wooden Doors and Window |
Note: DC 100V is the maximum switching-voltage rating of the contact; it is not the product’s power-supply voltage.
This product is a Normally Open (NO) magnetic reed switch.
| Magnet Position | Contact Status | Circuit Condition |
|---|---|---|
| Magnet near the sensor | ON | Circuit Closed / continuity available |
| Magnet away from the sensor | OFF | Circuit Open / no continuity |
Important: This is an NO type sensor only. It is not an NC sensor. Please confirm that your system requires an NO contact before purchase.
| Contact Type | Magnet Near the Sensor | Magnet Away from the Sensor | This Product |
|---|---|---|---|
| NO – Normally Open | Circuit Closed | Circuit Open | Yes |
| NC – Normally Closed | Circuit Open | Circuit Closed | No |
Install the sensor and magnet facing each other. Keep the distance between them within approximately 8–10mm for reliable detection. Before installation, confirm that your controller or alarm panel supports an NO contact.
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