--- product_id: 404703428 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: "VT7218" currency: VUV in_stock: true url: https://www.desertcart.vu/products/404703428-mc-31-wired-surface-mounted-nc-magnetic-door-window-contact store_origin: VU region: Vanuatu --- # Actuation Distance: 8mm±18mm NC Type: Normally Closed IP65: Weather Resistant MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws **Brand:** qwork **Price:** VT7218 **Availability:** ✅ In Stock ## Summary > 🔐 Lock in Safety, Unlock Peace of Mind! ## 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?** VT7218 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/404703428-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 - • **👥 Pack of 5:** Perfect for multiple entry points, enhancing your security network. - • **🌧️ Built to Last:** IP65 rated for durability against the elements. - • **🔒 Secure Your Space:** Ensure peace of mind with reliable door and window security. - • **🔧 Easy Installation:** Comes with 20 screws for hassle-free setup. - • **📏 Precision Engineering:** Designed for optimal actuation distance, keeping your home safe. ## Overview The QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch is a reliable security solution designed for doors, windows, and cabinets. This pack of 5 sensors, complete with 20 screws, features a normally closed contact type, ensuring that your spaces remain secure when the magnet is in proximity. With an actuation distance of 8mm±18mm and an IP65 weather resistance rating, these sensors are built for durability and precision, making them an ideal choice for enhancing your home security. ## Description QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws ## 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 | |---------------|-------| | Operation Mode | ON-OFF | | Contact Type | Normally Closed | | Connector Type | screws | | Brand | QWORK | | Terminal | Screw | | Actuator Type | Magnetic | | Contact Material | Plastic | | International Protection Rating | IP65 | | Number of Positions | 2 | | Specification Met | CE | | Lower Temperature Rating | 1 Degrees Celsius | | Controller Type | Ring | | Control Method | Touch | | Connectivity Protocol | X-10 | | Colour | White | | Net Quantity | 5.0 count | | Manufacturer | QWORK | | Country of Origin | USA | | Item model number | WD3811 | | Package Dimensions | 13.89 x 11.51 x 1.6 cm; 0.28 g | | ASIN | B08FT91C1G | ## Product Details - **Operation Mode:** ON-OFF - **Contact Type:** Normally Closed - **Connector Type:** screws - **Brand:** QWORK - **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) ![MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws - Image 2](https://m.media-amazon.com/images/I/616i2l0lUGL.jpg) ![MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws - Image 3](https://m.media-amazon.com/images/I/614vFt4m25L.jpg) ![MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws - Image 4](https://m.media-amazon.com/images/I/61GftIIm3bL.jpg) ![MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws - Image 5](https://m.media-amazon.com/images/I/61pJVoxSalL.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 ## Frequently Bought Together - QWORK MC-31 Wired Surface-Mounted NC Magnetic Door Window Contact Sensor Alarm Reed Switch, White, Pack of 5 with 20 Screws - HiLetgo 5V 4 Channel Relay Shield for UNO R3 Relay Shield Four Channel Relay Shield for UNO R3 - Arduino Uno Rev3 SMD Microcontroller Board [A000073] – ATmega328P, 16MHz, 32KB Flash, USB & PWM Support, Ideal for DIY Projects, STEM Learning, Robotics, and Prototyping --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/404703428-mc-31-wired-surface-mounted-nc-magnetic-door-window-contact](https://www.desertcart.vu/products/404703428-mc-31-wired-surface-mounted-nc-magnetic-door-window-contact) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-11*