Wired Door Alarm Sensors
Door sensors are perhaps the most popular sensors used with alarm systems. One of the most important aspects of keeping your home or business secure is knowing when a door or window is opened. You would be surprised at how many intruders walk right through the front door. Although a door sensor won't physically stop an intruder from entering your premises, it will ensure that you and/or the appropriate authorities are notified as soon as possible.
The way that door sensors work is with a sensor and a magnet. The sensor is generally installed on the door frame, while the magnet is placed on the actual door. For best results, the sensor should be within a half-inch of the magnet when the door is closed. Opening the door will cause the magnet to separate from the sensor. The sensor will then know to alert the system when this happens. How the system responds will depend on the programming settings for that zone. Additionally, most hardwired door sensors can alternatively be used as window sensors if desired.
The typical wired door sensor will connect with a panel through a 2-wire connection. In this case. both wires are actually used for data transmission. Since door contacts are purely mechanical devices, the do not require any power draw from the panel. This makes them some of the simplest and most straightforward sensors used with a security system. Their overall simplicity also makes them extremely affordable. Using hardwired contacts can help keep costs down if you don't mind running wires.
Speaking of running wires, this is something to consider if you are thinking about using wired door alarm sensors. Running wires from the panel to each individual sensor can be a difficult task for some DIY users. However, many DIY users are up to the task and ready to take on the challenge. And running wires is certainly not as hard as you might believe. But if you don't feel comfortable running wires, then you might want to consider using wireless sensors if possible. Or you can always as a trained electrician to run wires for you.
A great thing about hardwired door sensors is that they are usually compatible with any hardwired alarm system. You do not have to consider compatibility when using these sensors. For example, a hardwired DSC Door Sensor will work just fine with a hardwired Honeywell VISTA Alarm System. All the door sensors use the same connections, which gives them excellent compatibility.