Door Contacts - Overview

In this video, Jorge provides an overview of door and window contacts used with alarm systems. Door and window contacts are some of the most common sensors for alarm systems. The sensors let the panel know when the door or window is opened. There are many types of door and window contacts available.

There are many varieties of door sensors available. The sensors can be hardwired or wireless. Wired sensors need to have a wire run to the panel. This can make setup more difficult for the average DIY installer. But the good thing about wired sensors is that you never need to replace any batteries. Also, hardwired sensors are extremely affordable. Wireless sensors are very easy to install and program. You just have to make sure the wireless sensor you choose communicates at a frequency that is compatible with your alarm system.

Another major distinction for a door sensor is whether it is surface-mounted or recessed. A surface-mounted sensor will be installed on the outer surface of the door and its frame. This makes the sensor very easy to mount. On the other hand, a recessed sensor will be installed inside the door and its frame. A recessed sensor will remain hidden when the door is closed. However, you will need to drill holes inside the door and its frame to install a recessed door sensor. This is fairly easy, but some DIY installers may prefer recessed sensors, as fewer tools are needed.

Most door sensors work in the same way, but there are some exceptions. The typical door contact will include a sensor and a magnet. The sensor will go on or inside the door frame, while the magnet will go on or inside to moving part of the door. The sensor and contact should be in extremely close proximity, usually less than one half-inch apart, when the door is closed. There are also recessed plunger switch sensors that do not use a magnet. A plunger switch sensor has a switch that will be pressed-in when the door is closed. Opening the door will release the switch and tell the sensor to alert the system.

Mention products:

https://www.alarmgrid.com/products/honeywell-5800mini

https://www.alarmgrid.com/products/versa-2gig

https://www.alarmgrid.com/products/versa-ge

https://www.alarmgrid.com/products/versa-dsc

https://www.alarmgrid.com/products/honeywell-5816

https://www.alarmgrid.com/products/honeywell-5822t

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