VictorsHomeMagnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor for Home Security and Burglar Alarm Systems 5 Pcs

Working in the field of refrigeration automation, I faced a series of challenges when seeking an effective solution for door sensors. I tirelessly searched in various HVAC/R supply stores, but I couldn't find what I needed. However, when I turned to Amazon, I was fortunate to discover the Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor, and this completely changed the game for me.This product is a true gem for those working in refrigeration automation. Before finding it, I was paying exorbitant amounts for external sensors from Danfoss, which were taking a toll on my budget. However, the Magnetic Reed Switch RC-36 offers a sensational and much more affordable alternative. The option to choose between the NC (Normally Closed) or NO (Normally Open) configuration is a very convenient and flexible feature.The primary advantage of this sensor is its recessed nature. This means that it integrates seamlessly into doors, making applications cleaner and more professional. The end result is more efficient and aesthetically pleasing automation, which is a significant advantage when working with refrigeration systems.The installation of the Magnetic Reed Switch RC-36 was straightforward. The build quality of the product is remarkable, and the sensor's sensitivity is accurate. The cable's range is more than adequate, allowing for customized installation to meet specific project needs. It's essential to note that the opening and closing distance for sensor activation must be considered when choosing the correct diameter for installation, ensuring optimal functionality. Don't forget to select the appropriate NC or NO configuration based on your project's requirements.In summary, I am extremely pleased with the Magnetic Reed Switch RC-36 NC Recessed Wired Window Door Contact Sensor. It solved all my door sensor-related issues in refrigeration systems and provided a much more economical and practical solution. If you work in refrigeration automation or HVAC/R systems, do not hesitate to try this product. I am confident that you will be as impressed as I am.@ChrisCruzBolsonaro

Wound up getting the wrong kind. Ends up I needed NO not NC, but nothing wrong with these. Via multimeter I confirmed that switches operated NC as advertised.

That was not what I was looking for

Quality product built to last. I am very impressed!

These reed switches fail after the 3rd contact. They become stuck and stay always on. I wouldn't recommend. The size was accurate and the installation was normal. 4 out of 10 failed immediately. I'm looking elsewhere for another alternative

For my car alarm, they work great. They will tolerate almost a half inch or 14mm gap. Not to bad. The magnet on the opposite plug is strong.