Intruder Alarm Detectors and Sensors

For more information about Intruder Alarm Detectors and Sensors please contact us.

Detectors and Sensors Our Intruder Sensors are designed to detect a person within their range. Sensors positioned to detect someone as they attempt to enter the building are known as perimeter protection. Those positioned at strategic locations within the protected area give trap protection. We define the range of a detector by the distance and angle of unobstructed vision. A typical modern detector will cover an area of 15 meters with an included angle of 85 degrees. Passive detectors work by sensing heat in the form of infrared rays which are emitted from a persons body. Active detectors emit microwave or ultrasonic sound waves and measure the time taken for reflected rays to return. In the same way as a police radar, moving objects are detected. .