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  • Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket

Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket

4.5 out of 5 stars (182)
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Purchase options and add-ons

  • 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
› See more product details

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Product description

Product name: Heavy duty magnetic contacts for roller shutter door

Suitable: Roller shutter doors, garage doors
Mounting type: Surface mounted on the ground

Operation gap: ≥50mm
Connecting type: Wired
Wire length: 380 mm armored cable
Material:Metal Zinc alloy
Contact type: NC (normally closed) Switch OFF when magnet away

Max. Switching voltage: 28V DC
Max. current : 0.2A
Max. load : 3W

Product information

Technical Details

Manufacturer ‎GAGALOR
Item model number ‎MC-55ZL
Product Dimensions ‎10.6 x 5 x 2 cm; 290 g
ASIN ‎B07ZBT28L8

Additional Information

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Heavy Duty Wired Alarm Garage Door Magnetic Contacts Switch Sensor NC with Adjustable Bracket

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Product details

  • Is discontinued by manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 10.6 x 5 x 2 cm; 290 g
  • Date First Available ‏ : ‎ Jan. 7 2020
  • Manufacturer ‏ : ‎ GAGALOR
  • ASIN ‏ : ‎ B07ZBT28L8
  • Item model number ‏ : ‎ MC-55ZL
  • 鶹 Rank: #30,663 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)
  • Customer Reviews:
    4.5 out of 5 stars (182)

WARNING:

CHOKING HAZARD -- WARNING: This product contains small magnets. Swallowed magnets can stick together across intestines causing serious infections and death. Seek immediate medical attention if magnets are swallowed or inhaled.

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Customer reviews

4.5 out of 5 stars
182 global ratings

Customers say

The surveillance system works great with a switch that operates 100% correctly. Customers are pleased with its quality, describing it as rock-solid and more durable. Installation is easy and straightforward. The system offers good value for money, though customers have mixed opinions on the magnetic strength.
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26 customers mention reliability, 21 positive, 5 negative
Customers report that the surveillance systems work great and operate 100% correctly with no issues. They function well at the top of doors and work perfectly for garage management system micro-controller projects, helping to get alarms working again.
...allows the door to slide off in case of accidental contact, preventing damage, and the stronger magnet provides a much larger detection range....Read more
16 customers mention build quality, 13 positive, 3 negative
Customers are pleased with the surveillance system's build quality, describing it as rock-solid and a good product. They find it works well as alarm hardware and serves as an excellent replacement, particularly effective for garage door alarm systems.
...The build quality is great and they look really nice too. The productive cable is a great touch tooRead more
Excellent Replacement and Upgrade...Read more
7 customers mention installation, 6 positive, 1 negative
Customers find the surveillance system straightforward to set up, describing the installation process as easy and simple to complete.
...Installation was quick and simple—just two wires to connect, making it highly versatile and compatible with many systems....Read more
6 customers mention durability, 5 positive, 1 negative
Customers find the surveillance system to be more durable.
...It also feels far more durable than the cheap plastic ones I’ve used before....Read more
6 customers mention value for money, 5 positive, 1 negative
Customers find the surveillance system worth the price, indicating they consider it good value for money.
Great value fast deliveryRead more
...Definitely worth the investment, and I wish I had bought it in the first place!Read more
6 customers mention magnetic strength, 2 positive, 4 negative
Customers have mixed experiences with the magnetic strength of this surveillance system. Some find the magnet weak and tiny, while others appreciate the larger magnetic field. The system allows easy repositioning of the magnet, though some users report that contacts stick in the closed position when the magnet is removed.
...off in case of accidental contact, preventing damage, and the stronger magnet provides a much larger detection range....Read more

Top reviews from Canada

  • Tyler Brennan
    5.0 out of 5 stars Excellent Replacement and Upgrade
    Reviewed in Canada on March 21, 2025
    Verified Purchase
    I ordered this to replace the plastic sensor that came with my Wi-Fi garage door module, and it’s a huge improvement. The rounded plate allows the door to slide off in case of accidental contact, preventing damage, and the stronger magnet provides a much larger detection range. This let me mount it higher on the door, avoiding unnecessary contact while still accurately sensing the door's status.

    Installation was quick and simple—just two wires to connect, making it highly versatile and compatible with many systems. No drilling required, and the only tools needed were a screwdriver (or impact driver) and wire cutters to strip and trim the wires. I used heat shrink for a secure connection, but electrical tape or wire nuts would also work.

    So far, I haven’t had any false readings, and the larger magnetic field makes it much more reliable than the original sensor. It also feels far more durable than the cheap plastic ones I’ve used before. While those were about half the price, I’ve already gone through two of them due to breakage—this one seems built to last. Definitely worth the investment, and I wish I had bought it in the first place!
    One person found this helpful
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  • Sean Allan
    5.0 out of 5 stars Value
    Reviewed in Canada on September 5, 2025
    Verified Purchase
    Great value fast delivery
    Helpful
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  • Jen W
    5.0 out of 5 stars Solid, well made product
    Reviewed in Canada on September 16, 2024
    Verified Purchase
    Ive added two of these in my garage with a Zooz ZEN17 to track my doors open and close status

    The build quality is great and they look really nice too. The productive cable is a great touch too
    One person found this helpful
    Helpful
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  • Jason P.
    3.0 out of 5 stars not as shown
    Reviewed in Canada on June 4, 2025
    Verified Purchase
    Didn't come with angle plate.
    Helpful
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Top reviews from other countries

  • Michael W.
    5.0 out of 5 stars More clarity is needed of NC vs NO when magnet is near contacts
    Reviewed in the United States on March 14, 2024
    Verified Purchase
    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.
    Report
  • pldac
    5.0 out of 5 stars OK
    Reviewed in Australia on September 23, 2025
    Verified Purchase
    OK
    Report
  • S. Seeger
    5.0 out of 5 stars Work perfectly w/ home automation system
    Reviewed in the United States on December 22, 2024
    Verified Purchase
    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.
    Report
  • Michael
    1.0 out of 5 stars Rubbish - found out too late (by a few days) to return
    Reviewed in Australia on November 3, 2025
    Verified Purchase
    Rubbish! Cast switch housing too thin at mounting points. Both broke with ease on installation.
    Customer image
    Michael
    1.0 out of 5 stars
    Rubbish - found out too late (by a few days) to return

    Reviewed in Australia on November 3, 2025
    Rubbish! Cast switch housing too thin at mounting points. Both broke with ease on installation.
    Images in this review
    Customer image Customer image
    Report
  • Gooddaymate
    5.0 out of 5 stars Just what I needed to move alarm magnet after garage door bottom seal replacement
    Reviewed in the United States on February 23, 2026
    Verified Purchase
    The alarm contact for my 16' garage door is mounted to the floor of my garage. I replaced the bottom garage door seal and because of the wider seal, I had to remove my alarm system magnet bracket from the bottom of my garage door. The magnet had to be relocated to the bottom side of the garage door. The included adjustable bracket and magnet allowed me easily reposition the magnet over my current magnetic alarm system contact. It was an easy fix.
    Report
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