Overhead door contact

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An overhead door contact is a device used in the burglar alarm industry to detect when a door is opened or closed. It is typically installed on the top of a door frame and consists of a magnet and a switch. When the door is closed, the magnet and switch are in close proximity, which completes a circuit and signals to the alarm system that the door is secure. When the door is opened, the magnet and switch move apart, breaking the circuit and triggering the alarm.

Overhead door contacts are commonly used in both commercial and residential settings to protect against unauthorized entry. They are particularly useful for securing large doors, such as those found in warehouses or garages, as well as for securing entry doors to homes and businesses. Overhead door contacts can be wired or wireless, and can be integrated with other security devices, such as motion sensors and cameras, to provide a comprehensive security solution.

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If you are interested in learning more about overhead door contacts or any other security device, CGSmith can help. Our team of experts can provide a free consultation to assess your security needs and recommend the best solutions for your home or business. To get started, simply visit our Contact Us page and fill out the form. We will be in touch shortly to schedule a consultation and answer any questions you may have. With CGSmith, you can rest assured that your property is protected by the latest and most advanced security technology available.


1. What is an overhead door contact in a burglar alarm system?

An overhead door contact is a sensor that is installed on the top of a garage or overhead door to detect when the door is opened or closed. It is a crucial component of a burglar alarm system as it can trigger an alarm if an intruder tries to enter through the door.

2. How does an overhead door contact work?

An overhead door contact works by using a magnetic switch that is activated when the door is opened or closed. The sensor is installed on the top of the door frame, and a magnet is placed on the door itself. When the door is opened, the magnet moves away from the sensor, triggering the alarm.

3. Can an overhead door contact be installed on any type of door?

An overhead door contact can be installed on most types of garage or overhead doors, including sectional doors, rolling doors, and tilt-up doors. However, it is important to ensure that the sensor is compatible with the type of door being used and that it is installed correctly to ensure proper functioning.

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