Alarms are an excellent way to improve your home security and warn off any would be burglar. Alarms are one of the most common home security products used.
Simply put, motion sensors detect movement. These are perfect for your home as they are indiscreet and cover a large area. They incorpoarate cutting edge technology such as infrared, ultrasonic as well as other technologies such as vibration and contact. They then trigger an alarm to warn off intruders.
PIR stands for passive infrared. This means they stand by passively sensing any change in the atmosphere. It does not detect motion but it detects slight changes in temperature, ie, the body heat of an intruder.