Either by themselves or as a element of a bigger home security system, motion detector alarms are useful and popular. When movement is detected by the motion sensor, a motion detector alarm will activate to alert you to movement. Some systems make use of other methods of alerting you to movement including lights while other systems use a traditional alarm.

Inside the box, a motion sensor works either with ultrasonic, infrared, or microwave technology. Most motion detector alarms work inside of a set stretch surrounding the unit.

You may place a motion detector around your windows and doors or even outside of the building you're defending. There are even driveway motion sensor alarms that can let you know if there is cars approaching through the drive.

There are two general options for getting set up with your own motion sensor alarm system. If you already have an alarm system, adding a motion detector is simple. Just contact the people who installed your system and in most cases it may be added right on. If you do not have an existing setup, you may purchase these devices as stand alone units that are easily installed yourself.

Know that your system will not be able to tell the difference between a robber and a large deer. If you have pets or live in an area populated with deer or other wildlife, the likelihood of tripping the alarm is high. The only solution to this dilemma is to be choosy of where you put your unit to minimize the chances of false alarms.

Generally speaking, the standalone systems and upgrades are not pricey with many basic units going for below $100. If you're looking for a reliable way of knowing when there is goings-on on your premises, a motion detector alarm is just what you need.