Ex-Or LightSpot Mid Microwave Detector with photocell and semi flush mount. It utilise microwave radar to monitor a space for movement. This involves transmitting a very low power microwave signal and examining the reflected signal for frequency variations called doppler shifts. The microwave system is extremely sensitive to small body movements and provides effective presence detection in rooms up to 20m x 20m. This extreme sensitivity makes it essential that the detector be installed on a rigid surface that will not itself be subject to movement or vibration. Use a hole saw to drill a 76mm hole into the ceiling tile. The flush ring is designed to clamp the tile between its two halves.

• · Flush ring is designed to clamp the tile between its two halves
• · Utilise microwave radar to monitor a space for movement
• · Transmitting a very low power microwave signal
• · Examining the reflected signal for frequency variations