How Do Door and Window Sensors Work?

Home security systems are comprised of a few different devices that all work together to form layers of protection in and around your home. Door and window sensors make up the backbone of any home security system and monitor which doors and windows are opened and closed. Door security devices and window security devices are often very similar. Most systems come with a set number of sensors, and then you can add more depending on how many your home might need. Ideally, the sensors get placed on every door and window in the home. If a door or window gets opened or breached when the alarm is on, the sensor sends a signal to the main control panel, and immediately triggers the main alarm. There are a few different types of sensors. However, it’s important to understand how your sensors work in order to keep them well-maintained.

Door and window sensors

Brinks Home’s™ door/window sensors are surprisingly simple. They create a magnetic field that, when broken, sends a signal to your central system panel and sounds the alarm. For most homes, we recommend one sensor for every accessible door and window. Door/window sensors are the most common piece of security equipment when it comes to securing your home. We recommend a door or window sensor be placed on any easily accessible door or window for a secure home perimeter.

How do they work?

Door/window sensors generally come in two separate pieces. One piece fits onto the door or window itself, while its counterpart attaches to the frame or the pane of the window. Depending on your preference, heavy adhesive will usually keep the sensors in their place. If you want, sensors can be screwed directly into the frame or around the window for extra support, although it is not necessary. Be sure to position the two pieces of the sensor right next to each other since they interact when a door or window is moved. The sensors utilize magnetic fields to track movement between the door or window, and the frame. When they separate, such as when the door or window is opened, the sensors send a signal to the alarm panel. The panel will then assess the situation and notify you of unusual activity inside your home. In the event of a burglary, your professionally monitored home security system will contact the emergency response center closest to you to dispatch help.

Your home starts at the front door

Did you know your door and window sensors can also be used to secure areas of your home that you want to keep private or off-limits? For example, if you have a liquor cabinet that you want to secure from curious children, or an office you want isolated, simply place the sensors in the entry way of these areas in order to keep tabs on when they are opened. Programmable deadbolt locks are also recommended for doors around the home, especially the front door. 

According to FBI statistics, in nearly  60 percent of burglaries, forcible entry was used on the front door to gain access to the home. In total, more than a third of all burglaries involve the front door. It’s clearly important to secure your front door with quality locks and a home security system. Houses with alarm systems are three times less likely to fall victim to burglary. Obviously, criminals try to avoid the unwanted attention of loud alarms. If you’re interested in monitored home security, contact BrinksHome Security™ to inquire about an affordable wireless alarm system.