---
product_id: 248281967
title: "MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws"
brand: "qwork"
price: "€ 14.51"
currency: EUR
in_stock: true
category: "Qwork"
url: https://www.desertcart.gr/products/248281967-mc-31-wired-surface-mounted-nc-magnetic-door-window-contact
store_origin: GR
region: Greece
---

# Normally Closed (NC) contact type Pack of 5 with 20 screws included 8mm±1.8mm actuation distance MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws

**Brand:** qwork
**Price:** € 14.51
**Availability:** ✅ In Stock

## Summary

> 🛡️ Lock in peace of mind with QWORK’s magnetic precision!

## Quick Answers

- **What is this?** MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws by qwork
- **How much does it cost?** € 14.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/248281967-mc-31-wired-surface-mounted-nc-magnetic-door-window-contact)

## Best For

- qwork enthusiasts

## Why This Product

- Trusted qwork brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **IP65 Rated Durability:** Weather-resistant plastic housing built to withstand dust and moisture
- • **Robust NC Contact Design:** Normally Closed circuit guarantees fail-safe monitoring of doors and windows
- • **Complete Installation Kit:** Includes 5 sensors and 20 screws for seamless surface mounting
- • **Precision Magnetic Trigger:** Reliable 8mm±1.8mm actuation distance ensures instant security alerts
- • **Sleek & Discreet White Finish:** Blends effortlessly with modern interiors for professional-grade security

## Overview

The QWORK MC-31 is a surface-mounted, wired magnetic door/window contact sensor featuring a normally closed reed switch with an 8mm±1.8mm actuation distance. Packaged in sets of five with 20 screws, it offers easy installation and reliable security monitoring for doors, windows, and cabinets. Its sleek white plastic design is IP65 rated for dust and water resistance, making it ideal for both indoor and outdoor use in professional security systems.

## Description

desertcart.com: QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws : Industrial & Scientific

## Features

- Product Information: Product name: Surface-mounted Magnetic Door Switch, Type: MC-31, Color: White, Material: Plastic
- Specification: Contact Type: NC, Hole Dia.: 5.8mm, Actuation Distance: 8mm±18mm
- Sizes: 64*12.*12mm and 64*20*12mm（L * W * H),pack of 5 with 20 screws.
- NC Type: NC means normally closed. If the magnet is closed to this switch, the signal is conductive, otherwise, if the magnet is far away from this switch, the signal is disconnected.
- Applications: It is suitable for magnetic windows, doors, cabinets etc. Ideal for door, window security.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08FT91C1G |
| Actuator Type | Magnetic |
| Best Sellers Rank | #20,834 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Reed Switches #145 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 |

## Product Details

- **Brand:** QWORK
- **Circuit Type:** 1-way
- **Connector Type:** screws
- **Contact Type:** Normally Closed
- **Current Rating:** 10 A
- **Material:** Plastic
- **Mounting Type:** Door Mount
- **Operation Mode:** automatic
- **Switch Type:** Reed Switch
- **Terminal:** Screw

## Images

![MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws - Image 1](https://m.media-amazon.com/images/I/61qIPlQMfwL.jpg)

## Questions & Answers

**Q: how long is the leader wires?**
A: The leads are about 6 inches long.

**Q: Type of reed switch? Voltage/Current specs needed**
A: The reed switch type is NC. No voltage/current required.

**Q: Does this have an end of line (eol) resistor internally?**
A: It is a simple reed switch with no resistor.

**Q: Do these work with ADT**
A: They shot

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**Shop now:** [https://www.desertcart.gr/products/248281967-mc-31-wired-surface-mounted-nc-magnetic-door-window-contact](https://www.desertcart.gr/products/248281967-mc-31-wired-surface-mounted-nc-magnetic-door-window-contact)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-27*