--- product_id: 547128684 title: "Heavy Duty Wired Alarm Magnetic Garage Door Contact Switch Sensor NC with Adjustable Bracket" brand: "gagalor" price: "1534658₫" currency: VND in_stock: true reviews_count: 5 category: "Gagalor" url: https://www.desertcart.vn/products/547128684-heavy-duty-wired-alarm-magnetic-garage-door-contact-switch-sensor store_origin: VN region: Vietnam --- # 28V DC max switching voltage NC contact type for fail-safe security Adjustable bracket for versatile mounting Heavy Duty Wired Alarm Magnetic Garage Door Contact Switch Sensor NC with Adjustable Bracket **Brand:** gagalor **Price:** 1534658₫ **Availability:** ✅ In Stock ## Summary > 🔐 Elevate your home security with the sensor that means business. ## Quick Answers - **What is this?** Heavy Duty Wired Alarm Magnetic Garage Door Contact Switch Sensor NC with Adjustable Bracket by gagalor - **How much does it cost?** 1534658₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/547128684-heavy-duty-wired-alarm-magnetic-garage-door-contact-switch-sensor) ## Best For - gagalor enthusiasts ## Why This Product - Trusted gagalor brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Wide ≥50mm Operation Gap:** Generous detection range means fewer false alarms and smarter sensing. - • **Heavy-Duty 380mm Armored Cable:** Reinforced wiring ensures long-lasting, tamper-resistant connections. - • **Plug & Play Wired Connectivity:** Simple two-wire setup compatible with most home automation systems. - • **Adjustable Bracket for Perfect Fit:** Customizable mounting angles for seamless integration on any garage or roller shutter door. - • **Rock-Solid Metal Zinc Alloy Housing:** Durability that outlasts cheap plastic sensors, built for serious security. ## Overview The GAGALOR Heavy Duty Wired Alarm Magnetic Garage Door Contact Switch Sensor MC-55ZL features a robust metal zinc alloy housing and an adjustable bracket for easy surface mounting. Designed for roller shutter and garage doors, it offers a reliable NC (normally closed) contact type with a wide ≥50mm operation gap and a durable 380mm armored cable. Operating at up to 28V DC and 3W load, this sensor delivers dependable, long-lasting performance for professional-grade home security systems. ## Description Product name: Heavy duty magnetic contacts for roller shutter doorSuitable: Roller shutter doors, garage doorsMounting type: Surface mounted on the groundOperation gap: ≥50mmConnecting type: WiredWire length: 380 mm armored cableMaterial:Metal Zinc alloyContact type: NC (normally closed) Switch OFF when magnet awayMax. Switching voltage: 28V DCMax. current : 0.2AMax. load : 3W Review: More clarity is needed of NC vs NO when magnet is near contacts Review: Excellent Replacement and Upgrade ## Features - Suitable for roller shutter doors, garage doors. Metal zinc alloy housing - For home burglar alarm system, important kits of home security. - With adjustable bracket , easy for mounting. - Surface mounted on the ground with ≥ 50 mm operation gap - NC contact type , switch OFF when magnet away ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07ZBT28L8 | | Batteries Included | No | | Batteries Required | No | | Best Sellers Rank | #259,370 in Home Improvement ( See Top 100 in Home Improvement ) #877 in Home Security Alarms | | Brand | GAGALOR | | Country of Origin | USA | | Customer Reviews | 4.5 4.5 out of 5 stars (180) | | Date First Available | 10 April 2020 | | Includes Rechargeable Battery | No | | Item Dimensions LxWxH | 10.6 x 5 x 2 Centimeters | | Item Weight | 290 g | | Item model number | MC-55ZL | | Manufacturer | GAGALOR | | Model | MC-55ZL | | Mounting Type | Surface | | Power Source | dc | | Product Dimensions | 10.6 x 5 x 2 cm; 290 g | | Special Features | All metal case with good quality, ≥ 60mm big operation distance | | Wattage | 3 Watts | ## Images ![Heavy Duty Wired Alarm Magnetic Garage Door Contact Switch Sensor NC with Adjustable Bracket - Image 1](https://m.media-amazon.com/images/I/51p2LAcp0JL.jpg) ![Heavy Duty Wired Alarm Magnetic Garage Door Contact Switch Sensor NC with Adjustable Bracket - Image 2](https://m.media-amazon.com/images/I/51ZFpgYDKlL.jpg) ![Heavy Duty Wired Alarm Magnetic Garage Door Contact Switch Sensor NC with Adjustable Bracket - Image 3](https://m.media-amazon.com/images/I/51mok3lC8rL.jpg) ![Heavy Duty Wired Alarm Magnetic Garage Door Contact Switch Sensor NC with Adjustable Bracket - Image 4](https://m.media-amazon.com/images/I/61BGWi6udYL.jpg) ![Heavy Duty Wired Alarm Magnetic Garage Door Contact Switch Sensor NC with Adjustable Bracket - Image 5](https://m.media-amazon.com/images/I/5196ZY3A5-L.jpg) ## Questions & Answers **Q: Can this be used on a 24V Hvac system? To shut the system off when the garage door is open?** A: Voltage would be okay, but you’d be better to use this switch to trigger an SSR as I’m not sure of the current demand of the HVAC system. **Q: Can this be used directly in a 110v circuit with a LED (9w) lamp?** A: Dry closure contacts can be used in combination with a switching relay to accommodate high voltage applications. **Q: How does this work to advise you the garage door is open?** A: The circuit is closed when the door is closed. When the door is open, the alarm will trip. **Q: 12v circuit in series with switch sensor and a 12v solenoid (60ma) load. Why is the switch closed permantly when activated by magnetic?** A: It sounds like you are attempting to use this magnetic switch to control an output device, as per the solenoid. The switch would be designed to be used as an input interrupting device to trigger an open circuit on an alarm system. Even though only 60ma draw, it may be too much for the switch to let go of the contacts under draw. Two things you can try. An alarm system would use a 4.7K ohm resistor at the end of the line of a single circuit across the + and - terminals. This would draw down any lingering power in the circuit and possibly release the contact. If you have done that and it is not fixing the error, you could try running the magnetic switch to a small trigger relay, and have the relay switch the solenoid. If you are still unsuccessful, a mechanical limit switch in place of the magnetic trigger switch would be necessary and should solve your issue. ## Customer Reviews ### ⭐⭐⭐⭐⭐ More clarity is needed of NC vs NO when magnet is near contacts *by M***. on 14 March 2024* ### ⭐⭐⭐⭐⭐ Excellent Replacement and Upgrade *by T***N on 21 March 2025* ### ⭐⭐⭐⭐⭐ OK *by P***C on 23 September 2025* ## Frequently Bought Together - Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket - Seco-Larm SM-4201-LQ Track-Mount Overhead Door Magnetic Contact Switch, Rugged Aluminum Housing, 36" Wire Leads, for Closed Loop Circuits, 3" Gap, Weatherproof, Mounting Bracket Included - WESUA Magnetic Switch Alarm Sensor Overhead Garage Door Contacts with L Bracket --- ## 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.vn/products/547128684-heavy-duty-wired-alarm-magnetic-garage-door-contact-switch-sensor](https://www.desertcart.vn/products/547128684-heavy-duty-wired-alarm-magnetic-garage-door-contact-switch-sensor) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-22*