A magnet and a sensor are used in a magnetic door contact sensor. When the sensor is in close contact to a magnet, it includes an inbuilt reed switch that closes. The magnet is detached from the sensor when the door is opened. The reed switch is released, and the sensor alerts the panel.
As the doors are the most common way for an attacker to gain access to a facility, keeping door contacts in good working order is critical for any alarm system. Overhead Door Magnetic Contacts are also simple to install, which makes them ideal for DIY enthusiasts who wish to troubleshoot their own equipment.
A typical door contact sensor is made up of two components. These parts are a sensor and magnet. The sensor is usually mounted on or within the door's fixed frame. The magnet is then attached to or within a half-inch of the door's moving section, usually within a half-inch of the sensor. When the door is closed, the magnet must be very close to the sensor; otherwise, the device will not work effectively. When the door is closed, the sensor and magnet are frequently in direct touch. As a result, the term "door contacts" was coined.
Once the door is opened, the magnet will separate from the sensor. A reed switch inside the sensor will be released as a result of this. The sensor will then transmit an alert to the alarm panel, informing it that the situation has door has been opened.
Wireless door sensors use wireless RF signals to warn the panel, whereas wired door sensors use a direct hardwired connection to convey the alert. When the signal is received, the system responds according to the zone's programming parameters. Door contacts are categorised as surface-mounted magnetic contacts or recessed mounted magnetic contacts, in addition to being wireless or hardwired.
Surface-mounted magnetic contacts are visible from the outside and are positioned on the outside of the door and frame. Recessed mounted magnetic contacts are hidden contacts that are positioned inside the door and frame. Although some users prefer recessed contacts because they are hidden, they are more difficult to install because holes must be drilled.
There's also a different kind of recessed door sensor known as plunger switches. They come with a switch that is pressed-in when the door is closed. When the door is opened, the switch will pop up, and the sensor will alert the system. Most reputed manufactures offer a range of magnetic door contacts such as Overhead Door Magnetic Contacts, Surface Mounted Magnetic Contacts, and Recessed Mounted Magnetic Contacts etc. You can choose the one based on your specific purpose and needs.
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