---
product_id: 464825616
title: "5 Pack Surface Mounted NC Magnetic Door Contacts Switch Sensor for Alarm"
brand: "wesua"
price: "€ 20.58"
currency: EUR
in_stock: true
reviews_count: 8
category: "Wesua"
url: https://www.desertcart.nl/products/464825616-5-pack-surface-mounted-nc-magnetic-door-contacts-switch-sensor
store_origin: NL
region: Netherlands
---

# Compact 8.27x5.91x0.79 in Normally Closed (NC) magnetic switch Surface-mounted with screw installation 5 Pack Surface Mounted NC Magnetic Door Contacts Switch Sensor for Alarm

**Brand:** wesua
**Price:** € 20.58
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in safety with style — because your space deserves smart protection.

## Quick Answers

- **What is this?** 5 Pack Surface Mounted NC Magnetic Door Contacts Switch Sensor for Alarm by wesua
- **How much does it cost?** € 20.58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/464825616-5-pack-surface-mounted-nc-magnetic-door-contacts-switch-sensor)

## Best For

- wesua enthusiasts

## Why This Product

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

## Key Features

- • **Hassle-Free Setup:** Surface-mounted with screws—no professional installation needed, saving you time and money.
- • **Discreet & Sleek Design:** Compact ABS plastic housing blends effortlessly with modern doors and windows.
- • **Reliable Magnetic Trigger:** NC reed switch ensures immediate alarm activation the moment your door/window opens.
- • **Value Pack for Full Coverage:** Five pairs included to secure multiple entry points without breaking the bank.
- • **Seamless Security Integration:** Easily pairs with your existing alarm system for instant peace of mind.

## Overview

This 5-pack of surface-mounted NC magnetic door contact sensors offers a compact, reliable solution for home and office security. Crafted from durable ABS plastic, each sensor pair uses a normally closed reed switch that triggers your alarm system instantly when doors or windows open. Easy screw installation means no professional help required, making it perfect for millennial managers seeking efficient, sleek, and cost-effective security upgrades.

## Description

Magnetic contacts is widely used for alarm system(panel) to detect state of door. It consist of a reed switch part and a magnet part . When door closed, reed switch is effected by magnet and turn ON; when door open, reed switch is effected by magnet and turn OFF, trigger alarm. Contact type: NC Material: ABS plastic Color: white Pack: 5pairs/bag

Review: Wonderful - This great product work very well
Review: They work great - Great replacement equipment, inexpensive and they work fine

## Features

- Small size, nice looking, ideal for window or wooden door
- Screws installation make it more firm
- ABS normally closed door contact switch, alarm when the magnet part away
- Application: door / window entry burglar alarm system
- NC magnetic contact switch sensor

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B7DW8QHK |
| Alert Type | Motion |
| Assembly Instructions Description | Easy to install, no professional help required |
| Batteries Required? | No |
| Best Sellers Rank | #234 in Home Security Systems |
| Brand | WESUA |
| Color | white |
| Compatible Devices | Alarm System |
| Connectivity Technology | Wired |
| Control Method | App |
| Customer Reviews | 4.2 4.2 out of 5 stars (100) |
| Date First Available | July 23, 2022 |
| Included Components | Switch |
| Installation Type | Surface-Mounted |
| Item Weight | 4.2 ounces |
| Item dimensions L x W x H | 8.27 x 5.91 x 0.79 inches |
| Item model number | MCS-31 |
| Manufacturer | WESUA |
| Material | ABS plastic |
| Part Number | MCS-31 |
| Power Source | Battery Powered |
| Product Dimensions | 8.27 x 5.91 x 0.79 inches |
| Sensor Technology | Magnetic |
| Unit Count | 10.0 Count |

## Product Details

- **Brand:** WESUA
- **Color:** white
- **Compatible Devices:** Alarm System
- **Item dimensions L x W x H:** 8.27 x 5.91 x 0.79 inches
- **Power Source:** Battery Powered

## Images

![5 Pack Surface Mounted NC Magnetic Door Contacts Switch Sensor for Alarm - Image 1](https://m.media-amazon.com/images/I/41KgdnUC3JL.jpg)

## Questions & Answers

**Q: Are these assemblies really 8 x 5 inches?**
A: The magnets are about 2 1/2 inches long and 5/8 inches wide.  I think the dimensions you referred to are the size of the packing box.

**Q: Are these compatible with any brand window sensor? Eufy to be specific?**
A: I don't know about eufy,  but i would think so as these are simple magnet triggered sensors.  Low volt wires screw into base sensor and top sensor is simply a magnet.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Wonderful
*by B***P on December 29, 2025*

This great product work very well

### ⭐⭐⭐⭐⭐ They work great
*by R***H on November 26, 2025*

Great replacement equipment, inexpensive and they work fine

### ⭐⭐⭐⭐ They work great.
*by A***. on December 25, 2024*

They work great.

## Frequently Bought Together

- WESUA 5 Pack Surface Mounted NC Magnetic Door Contacts Switch Sensor for Alarm
- Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket
- 10 Sets Pack of Wired Surface Mounted Alarm Magnetic Contacts Door Window Reed Switch Sensor with Double Side Tape

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**Shop now:** [https://www.desertcart.nl/products/464825616-5-pack-surface-mounted-nc-magnetic-door-contacts-switch-sensor](https://www.desertcart.nl/products/464825616-5-pack-surface-mounted-nc-magnetic-door-contacts-switch-sensor)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-20*