This is a dual technology occupancy sensor with both passive infra-red (PIR) detection and noise (sound) detection. Lighting will be activated after movement is detected. The delay timer will then begin counting. If either noise or movement is thereafter detected, the timer will be reset and begin timing again. The PIR detector can detect movement up to 10 metres. The microphone can detect normal conversation up to about four metres distance. The lighting will be switched off if neither motion nor sound is detected during the timer period. Noise cannot activate the lighting – movement must be detected first to enable the microphone.

Daylight harvesting can be gained by adjusting the ‘lux’ switching threshold. Lighting with then only be activated if the ambient light in the room is below the ‘lux’ threshold. The unit has full 360° motion and noise sensing.