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The QWORK MC-31 is a white, surface-mounted magnetic reed switch sensor designed for door and window security. Featuring a normally closed (NC) contact type with an 8mm±18mm actuation distance, it delivers precise and reliable intrusion detection. This pack of 5 sensors includes 20 screws for easy installation and boasts an IP65 rating for dust and water resistance, making it ideal for both indoor and outdoor security setups compatible with most alarm systems.




| ASIN | B08FT91C1G |
| Actuator Type | Magnetic |
| Best Sellers Rank | #33,039 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 in Reed Switches #222 in Home Security Systems |
| Brand Name | QWORK |
| Circuit Type | 1-way |
| Color | White |
| Compatible Devices | Alarm Control Panels, Security Systems |
| Connectivity Protocol | X-10 |
| Connector Type | Screws |
| Contact Material | Plastic |
| Contact Type | Normally Closed |
| Control Method | Touch |
| Control Type | On/Off |
| Controller Type | Ring |
| Current Rating | 10 A |
| Customer Reviews | 4.1 4.1 out of 5 stars (494) |
| International Protection Rating | IP65 |
| Item Weight | 0.27 g |
| Lower Temperature Rating | 1 °C |
| Manufacturer | QWORK |
| Material Type | Plastic |
| Model | WD3811 |
| Mounting Type | Door Mount |
| Number of Items | 5 |
| Number of Positions | 5 |
| Operation Mode | automatic |
| Part Number | WD3811 |
| Specification Met | CE |
| Switch Type | Reed Switch |
| Terminal | Screw |
| Unit Count | 5 Count |
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