An outdoor motion detector for perimeter monitoring, ideal to trigger alarm and video monitoring systems. The DET-REXT-PIR30 is an outside radio PIR (Passive Infra-Red) detector for perimeter protection. The unit uses two independent detectors, both of which must trigger to signal an alarm. This delivers precise, reliable detection. Scantronic?s class leading radio combined with GJD?s reputation for flexibility, stability and accuracy identify threats before they have a chance to cause loss or damage.