Door sensor

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A door sensor is a device used in the burglar alarm industry to detect when a door is opened or closed. It is a small, discreet device that is typically installed on the door frame and the corresponding door. When the door is opened, the sensor sends a signal to the alarm system, which triggers an alert to the monitoring center or the homeowner. Door sensors are an essential component of any security system, as they provide an additional layer of protection against unauthorized entry.

Door sensors are commonly used in both commercial and residential settings. In commercial applications, they are often used to secure entrances and exits, such as loading docks, back doors, and employee entrances. In residential settings, they are typically installed on exterior doors, such as front doors, back doors, and garage doors. Door sensors can also be used to monitor interior doors, such as those leading to a safe or a storage room.

CGSmith is a business and residential security system installation and monitoring company based out of the Milwaukee WI area. As a leading provider of security solutions, CGSmith understands the importance of door sensors in protecting homes and businesses from intruders. They offer a wide range of security products and services, including door sensors, to help their clients feel safe and secure. If you are interested in learning more about door sensors or any other security products, you can visit the Contact Us page on the CGSmith website. Their team of experts will be happy to answer any questions you may have and help you find the right security solution for your needs.


1. What is a door sensor in a burglar alarm system?

A door sensor is a device that is installed on a door to detect when it is opened or closed. It is a crucial component of a burglar alarm system as it triggers an alarm when an unauthorized entry is detected.

2. How does a door sensor work?

A door sensor typically consists of two parts – a magnet and a sensor. The magnet is attached to the door frame, while the sensor is attached to the door itself. When the door is closed, the magnet and sensor are in close proximity, and the sensor detects the magnetic field of the magnet. When the door is opened, the magnet moves away from the sensor, breaking the magnetic field, and triggering the alarm.

3. Can a door sensor be installed on any type of door?

Yes, door sensors can be installed on any type of door, including wooden, metal, or glass doors. However, the installation process may vary depending on the type of door and the type of sensor being used. It is recommended to consult with a professional installer to ensure proper installation and functionality of the door sensor.

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