Intrusion Detection

Intrusion Detections Systems (IDS), are sited within a building and offer out of hours protection when the building or buildings are locked at night.

CPNI assured IDS will always consist of at least two separate components:

  • IDS control and indicating equipment (CIE) - the “brains” which will audit and control the system
  • Detectors – individual mounted detectors which will sense an intrusion

A complete IDS will take the overall grading of the lowest component, for example;

ENHANCED CIE, 3 ENHANCED detectors, 2 BASE detectors = BASE overall

For in-depth guidance to IDS, see:  Intrusions Detection Systems Guidance for Security Managers

For the purpose of assessing and assuring, CPNI have split IDS into different categories;

  • protective switches: detects the opening of a door or window to which it is fitted; 
  • vibration detectors : detects vibrations on the structure to which it is fitted:
  • beam detectors : detects the presence of an intruder by the disruption of one or more infra-red or laser beams; 
  • microwave sensors: detects the presence of a moving intruder by responding to the reflection of radio waves; 
  • break glass detectors : detects glass windows being broken;
  • Passive infra-red sensors: detects the presence of a moving intruder by responding to the infra red (heat) signature generated by the human body; 
  • control and Indicating equipment (CIE)


Did you find this page useful? YesNo
Thank you for your feedback. If you have any further suggestions on how this information can be made even more useful to improve your experience, feel free to share details below.
Thank you for your feedback. Sorry to hear that you haven't found this information useful. Please help us improve your experience and share how we can make this information more useful for you.