--- product_id: 473872178 title: "5 Pack Magnetic Contacts Switch Window Door Sensor for Alarm System NC 3/8\"" brand: "wesua" price: "€ 15.95" currency: EUR in_stock: true reviews_count: 9 category: "Wesua" url: https://www.desertcart.gr/products/473872178-5-pack-magnetic-contacts-switch-window-door-sensor-for-alarm store_origin: GR region: Greece --- # Compact 3/8" diameter No batteries needed Tool-free flush mount install 5 Pack Magnetic Contacts Switch Window Door Sensor for Alarm System NC 3/8" **Brand:** wesua **Price:** € 15.95 **Availability:** ✅ In Stock ## Summary > 🔐 Secure your space with stealth and simplicity—because safety should never be an afterthought. ## Quick Answers - **What is this?** 5 Pack Magnetic Contacts Switch Window Door Sensor for Alarm System NC 3/8" by wesua - **How much does it cost?** € 15.95 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/473872178-5-pack-magnetic-contacts-switch-window-door-sensor-for-alarm) ## 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 - • **Discreet & Sleek:** Flush-mounted cylindrical design fits seamlessly on windows and doors for a clean, professional look. - • **Effortless DIY Setup:** Small size and press-to-fit installation means no special tools or expertise required—secure your space in minutes. - • **Value Pack Advantage:** Five pairs per pack provide comprehensive coverage for multiple entry points—protect your entire home or office. - • **Universal Compatibility:** Standard 300mm #24 AWG leads make integration with most alarm systems a breeze. - • **Reliable Security Trigger:** NC (Normally Closed) reed switch ensures instant and accurate alarm activation when doors or windows open. ## Overview This 5-pack of magnetic contact switches features compact 3/8" diameter ABS plastic sensors designed for flush mounting on windows and wooden doors. Utilizing a normally closed reed switch activated by a magnet, these sensors reliably trigger alarms upon entry detection. With standard 300mm #24 AWG leads and no battery requirement, they offer easy DIY installation and seamless integration with most alarm systems, making them an ideal, cost-effective security upgrade. ## 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: Works great - Works perfectly Review: Easy to install and works fine - Very simple to install and they work just fine. There is nothing fancy about these and they are just simple, cheap replacement contacts that anyone can install. If you need to replace a few of these at your home you can easily do it yourself instead of paying an alarm company to do it for you. ## Features - Small size, easy to install and concealment - Flush mounted cylindrical magnetic contacts - φ10mm 3/8" diameter press to fit - Ideal for window or wooden door - Standard 300mm #24 AWG leads ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B7DSF6KW | | Batteries Required? | No | | Best Sellers Rank | #113,640 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #36 in Garage Door Sensors | | Control Method | Touch | | Customer Reviews | 4.5 4.5 out of 5 stars (77) | | Date First Available | July 23, 2022 | | Description Pile | Alkaline | | Included Components | Switch | | Item Weight | 1.76 ounces | | Item model number | MCS-33B | | Manufacturer | WESUA | | Mounting Type | Window Mount | | Part Number | MCS-33B | | Product Dimensions | 7.87 x 5.91 x 0.79 inches | | Sensor Technology | Contact Sensor | | Voltage | 12 Volts (DC) | ## Product Details - **Battery Description:** Alkaline - **Brand:** WESUA - **Color:** white - **Compatible Devices:** Alarm Panels - **Power Source:** Battery Powered ## Images ![5 Pack Magnetic Contacts Switch Window Door Sensor for Alarm System NC 3/8" - Image 1](https://m.media-amazon.com/images/I/41Hn2zT8DyL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great *by B***T on March 11, 2025* Works perfectly ### ⭐⭐⭐⭐⭐ Easy to install and works fine *by Z***S on January 7, 2024* Very simple to install and they work just fine. There is nothing fancy about these and they are just simple, cheap replacement contacts that anyone can install. If you need to replace a few of these at your home you can easily do it yourself instead of paying an alarm company to do it for you. ### ⭐⭐⭐⭐⭐ Great Buy *by F***O on November 1, 2023* These contacts were perfect. They easily fit my door frame for my home alarm system. Along with a quick electrical connection and I was good to go at an outstanding price. Plus I ordered them on Tuesday and they were in my mailbox on Wednesday US postal delivery. ## Frequently Bought Together - WESUA 5 Pack Magnetic Contacts Switch Window Door Sensor for Alarm System NC 3/8" - 100pcs White Dry B-Connector Wire Telephone Alarm Wire Crimp Beanies Splices for Low Voltage - VictorsHome Magnetic Reed Switch NC Surface Mount Wired Door Window Contact Sensor with Adhesive Paper for Home Security and Burglar Alarm Systems MC-38 5pcs --- ## 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.gr/products/473872178-5-pack-magnetic-contacts-switch-window-door-sensor-for-alarm](https://www.desertcart.gr/products/473872178-5-pack-magnetic-contacts-switch-window-door-sensor-for-alarm) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-04-23*