How Do Security Alarm Systems Work?

How Do Security Alarm Systems Work?

Today, with the rising problem of violent crime, a security alarm system or a burglar alarm may be your best solution to protect your family and valuables. While many homes and businesses already have these security alarms systems in place, many people do not. Why? Is it too expensive for the average home owner, perhaps? But, on the other hand, what value can you place on safety? These can be difficult questions for the average person. Let's take a closer look at security alarm systems and see if we can reach a solution to these and other questions.

How do external Security alarm systems work?

The simplest security alarm systems work on a "broken" circuit concept. These alarms are built into an entrance way, like a door or window, and the way they work is very simple. Electrical current must have a path to flow through. If you break the path, the charge is broken and the current stops. In a closed circuit system, the path that the electricity travels on is closed when a door or window is closed or shut. This means that the electricity can continue to flow from one side to the other. If the door or window is opened, it breaks the path the electricity is traveling on. This signals an alarm to go off. Letting you know a door or window has been opened.

In an open circuit system, the opposite holds true. When you open a door or window with this system it closes the system or flow of electricity and the alarm will go off. Letting you know a door or window is open. Perhaps, by someone you were not expecting. You may want to use a closed circuit, rather then an open one, as a burglar can cut the wires on the open circuit fairly easily.

Some open and closed circuit systems use a magnet embedded in the door or window that lines up with a switch. Others use a spring-driven switch. There are also the switches that are little buttons that are pressed by the pressure of the closed door or window and released when it is opened.

How do interior security alarm systems work?

While circuit alarms can work fairly well to keep an intruder out, what do you do if one gets past the circuit alarms and gets inside? Motion detectors are probably your best defense against an intruder who gets inside.

There are several different types of motion detectors in the world. You see them at work every time you go to the grocery store. They open the door for you. The door works on a radar based motion detector. The little box you see above the door sends out a microwave signal or ultrasonic sound waves. These units then wait for the waves to reflect off of something, usually you, and bounce back. When they bounce off of you, it displaces the reflection in a disturbed pattern and it then opens the door. With this type of security alarm system, the box is in the room and when the pattern is disturbed it send a signal to set off the alarm.

There are many different security alarm systems on the market. Some can be had for around as a DIY project, while others require a specialist to install. The choice is yours on which you choose.

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