What are the types of contactor?
A door contact sensor is powered by a sensor and a magnet. When the sensor is in close proximity to a magnet, an internal reed switch closes. The magnet is separated from the sensor when the door is opened. This activates the reed switch, and the sensor notifies the control panel.
Door contacts are among the most commonly used sensors in security systems. These are the best devices for notifying a system when a door is opened. Because doors are the most common way for an intruder to gain entry into a building, keeping functional door contacts is critical for any alarm system. Door contacts are also simple to understand, making them ideal for do-it-yourselfers who want to troubleshoot their own equipment. There are also different types of door contact sensors, such as overhead door magnetic contacts, surface-mounted magnetic contacts, recessed-mounted magnetic contacts, etc.
A typical door contact sensor is made up of two parts: a sensor and a magnet. The sensor is typically installed on or inside the door's stationary frame. The magnet must be very close to the sensor when the door is closed or the device will not work properly.
When the door is closed, the sensor and magnet frequently make contact. As a result, the phrase "door contacts" came into use. When the door is opened, the magnet will separate from the sensor. This will cause a reed switch inside the sensor to be activated. The sensor will then send a signal to the alarm panel, alerting it to the fact that the door has been opened. Wireless door sensors will notify you. Wireless door sensors send alerts to the panel via wireless RF signals, whereas wired door sensors send alerts via a direct hardwired connection. When the signal is received, the system will respond based on the zone's programming settings.
Aside from being wireless or hardwired, door contacts can also be
surface-mounted magnetic contacts
or recessed-mounted magnetic contacts.
Surface-mounted magnetic contacts
are mounted on the outside of the door and frame, and they are visible from the outside. Recessed contacts are installed inside the door and frame, and they are hidden from view. Although some users appreciate the fact that
recessed-mounted magnetic contacts
are hidden, these sensors are more difficult to install since holes need to be drilled. There is also another special type of recessed door sensor called plunger switches. These devices have 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. A door contact sensor supplier can help you choose the right product to meet your specific needs and ensure the maximum safety of your premises.
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