The main reason to have a home security burglar alarm is to alert the home owner, in addition to other people who may be nearby, in the event that an illegal invasion of a house is happening. Its secondory function is to help to discourage burglars and theives from going into the house now that his or her stealth has been negated.

An alarm security system uses various motion-sensing technologies to detect if a person has entered a protected premises. Indoor home security alarm systems uses infrared, radio frequencies, microwave, and photo-electric beams to detect a movement inside a building. There are also alarms that detect the sound of glass breaking which can be very useful on windows and glass doors. Some alarm systems even detect smoke, heat, and carbon dioxide which provides added protection against these hazards.

If you are planing to buy an alarm security system for your home there are a few things that you should consider prior to selecting which type to invest in. An important one is whether you need to get a hard-wired alarm security system or a wireless security system. A hard wired alarm system is usually much more sophisticated and considered to be more reliable but they are quite complex to install in homes that are already furnished because you have to route all the wires. On the other hand, a wireless alarm system is extremely simple to install, they can be conveniently positioned anywhere in the home, and because they are powered by a battery, they can be in operation even during power blackout when you may be most vulnerable to a break in. However, a wireless alarm security system has combined parts that could be easily deactivated by a thief or burglar.

Another particular consideration when selecting an alarm security system is the specific nightly behavior of the people in your house. If there are pets, be sure that the home burglar alarm that you get is able to distinguish between people and animals to prevent false alarms happening. Also you need to consider if there are people in your home who like to get up during the middle of the night or even if there is someone who gets home late at night, as this can trigger the system as well. Be sure that your home security alarm system has more than one keypad as may be required by the members of your household.