--- product_id: 177263149 title: "Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket" brand: "gagalor" price: "R407" currency: ZAR in_stock: true reviews_count: 13 category: "Gagalor" url: https://www.desertcart.co.za/products/177263149-heavy-duty-wired-alarm-garage-door-magnetic-contacts-switch-sensor store_origin: ZA region: South Africa --- # β‰₯50mm adjustable operation gap 380mm armored wired cable for secure connection Metal zinc alloy housing for durability Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket **Brand:** gagalor **Price:** R407 **Availability:** βœ… In Stock ## Summary > πŸ” Lock in peace of mind with heavy-duty precision! ## Quick Answers - **What is this?** Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket by gagalor - **How much does it cost?** R407 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/177263149-heavy-duty-wired-alarm-garage-door-magnetic-contacts-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 - β€’ **Rock-Solid Security:** Heavy-duty metal housing ensures long-lasting protection against break-ins. - β€’ **Precision Adjustable:** Customizable β‰₯50mm operation gap fits various garage and roller shutter doors seamlessly. - β€’ **Effortless Installation:** Adjustable bracket and surface mount design make setup quick and hassle-freeβ€”no compromises on safety. - β€’ **Versatile Compatibility:** NC (Normally Closed) contact type integrates effortlessly with most home automation and burglar alarm setups. - β€’ **Plug & Play Wired Reliability:** 380mm armored cable guarantees stable, interference-free connectivity for your alarm system. ## Overview This Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor features a robust metal zinc alloy housing and a 380mm armored cable, designed for reliable, wired security on roller shutter and garage doors. With an adjustable bracket and a β‰₯50mm operation gap, it offers flexible installation and integrates seamlessly with home burglar alarm systems using a normally closed (NC) contact type for enhanced protection. ## Description Product name: Heavy duty magnetic contacts for roller shutter doorSuitable: Roller shutter doors, garage doorsMounting type: Surface mounted on the groundOperation gap: β‰₯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 - I used this product to replace an older set of alarmed garage door magnetic contacts that were of much lesser quality and had failed...I was concerned about the strength of any replacements until I found this product online. I must say, I am very pleased with its quality, ease of installation and performance. I highly recommend it. It can be purchased in a NC (normally closed by the magnet) or NO (normally open by the magnet) depending on customer need. Review: Work perfectly w/ home automation system - Bought these, as opposed to cheaper, smaller, plastic ones, as they had good reviews, appeared to be fairly heavy-duty, and yet were basic switches I needed for my dry-contact firmware for a home automation device (RATGDO for anyone counting). They are significantly larger than the small plastic ones, but since I've had them installed (maybe ~ a year now) they are rock-solid and just plain work. Love the wrapped metal cabling at the end, which makes me feel they are more durable (and they probably are), and I mounted them with 3M double-sided tape, to the aluminum rail and framing of my garage door. ## 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 β‰₯ 50 mm operation gap - NC contact type , switch OFF when magnet away ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #108,838 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #37 in Garage Door Sensors | | Customer Reviews | 4.6 out of 5 stars 195 Reviews | ## Images ![Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket - Image 1](https://m.media-amazon.com/images/I/51p2LAcp0JL.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 March 14, 2024* I used this product to replace an older set of alarmed garage door magnetic contacts that were of much lesser quality and had failed...I was concerned about the strength of any replacements until I found this product online. I must say, I am very pleased with its quality, ease of installation and performance. I highly recommend it. It can be purchased in a NC (normally closed by the magnet) or NO (normally open by the magnet) depending on customer need. ### ⭐⭐⭐⭐⭐ Work perfectly w/ home automation system *by S***R on December 22, 2024* Bought these, as opposed to cheaper, smaller, plastic ones, as they had good reviews, appeared to be fairly heavy-duty, and yet were basic switches I needed for my dry-contact firmware for a home automation device (RATGDO for anyone counting). They are significantly larger than the small plastic ones, but since I've had them installed (maybe ~ a year now) they are rock-solid and just plain work. Love the wrapped metal cabling at the end, which makes me feel they are more durable (and they probably are), and I mounted them with 3M double-sided tape, to the aluminum rail and framing of my garage door. ### ⭐⭐⭐⭐⭐ Garage Door Sensors *by Q***H on September 21, 2024* I have six of these industrial grade garage door sensors in use and have had great luck with the reliability. You don’t have to mount them on the floor to work, they also work great at the top of the door. ## 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/177263149-heavy-duty-wired-alarm-garage-door-magnetic-contacts-switch-sensor](https://www.desertcart.co.za/products/177263149-heavy-duty-wired-alarm-garage-door-magnetic-contacts-switch-sensor) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-07-06*