Active Ultasonic

This is a motion detection system that floods ultrasonic sound energy into a monitored area. An alarm is generated when a sensor detects a change in the reflected energy pattern.

 

Principle Drawback

An intruder moving slowly in the area of coverage may not be detected by the sensors.

Other Shortcomings:

  • Intrusion attempts may not generate enough sound to trigger sensor
  • Sensors require electricity

Fiber Fence Advantages over Audio Sensors

  • Not affected by environmental noise
  • Sensors do not require electricity
  • Can be calibrated to eliminate nuisance alarms
  • Designed specifically for Perimeter Monitoring
  • Economical to purchase
  • Easy to install