Everyone needs security. Yet with our era of computer passwords, magnetic keys, security cameras, laser beams and security guards do you need a simple door alarm? Really, if an intruder wanted to get to a special area or access an off limits room, he would have to get through a series of protection measures. How can door alarms contend with a thief capable of doing that?

What Is A Door Alarm?

A door alarm is a simple gadget which is installed on your door frame. If someone enters the door the device will give out a loud sound, warning you of the entry of a prowler.

Door alarms are commonly seen at homes, frequently as a garage door safety precaution. They are also used at business locatons as well. These units are easy to use, inconspicuous and not usually objects of attention.

The basic benefit of a door alarm is its low cost measured up against other security devices. You’ll find door alarms anywhere from 10 to 50 dollars depending on the manufacturer and the quality of the unit you select. Of course, if you’re buying them for your organization you should make a good balance between cost and quality. If anything bad happens due to a malfunctioning door alarm, you will be the one blamed for choosing it.

How Does A Door Alarm Work?

A door alarm creates a magnetic field. When that magnetic field is severed, the device starts sounding a loud siren which startles the intruder and alerts you to the illegal entrance.

Because door alarms don’t eat up a lot of battery power, a gsm door alarm doesn’t have to be connected to an outlet. It uses a common battery which lasts, approximately, a year. If you have wireless door alarms installed or wish to install them, you should consider paying for premium batteries and having a maintenance plan and change the batteries at determined dates.

In the case of hard wired door alarms, these devices are plugged into a wall socked or junction box. The more expensive alarms have battery back up in the event of a power out.

What Are The Components of Door Alarm Systems?

A door alarm is simply a receiver and a sensor. The devices sensor is attached to the door frame and the receiver is placed on the actual door. The sensor will be the one emitting the magnetic field. The receiver is in charge of signalling the alarm if and when the signal of the magnetic field is cut off.