The Hytronik HC009S/EXT is a microwave occupancy sensor built for false or plasterboard ceilings, with an integrated photocell. It sits hidden above the ceiling line and remotely switches LED loads up to 1200W, so it works even when the light fitting itself has no room for an internal sensor.

Key features of the microwave sensor

• Detection method, microwave technology using Doppler Frequency, sending radio waves and reading the reflected energy
• Reliability, more reliable at detecting movement than infrared sensors and lasts five times longer
• Coverage, larger elliptical coverage than IR, picking up motion only
• Load handling, remotely switches LED loads up to 1200Watt
• Response time, lights switch on within milliseconds of detecting movement
• Timer, lights switch off after a user-defined time scale once movement stops
• Photocell, integrated photocell included

Applications

The HC009S/EXT is intended for small light fittings where a sensor cannot be fitted internally. A common project is an office with a false or plasterboard ceiling lit by 600x600 LED panels: the sensor mounts above the ceiling, invisible from below, and controls the panels remotely.

False ceiling installation

Because the sensor sits above the ceiling tile rather than in the fitting itself, the surface finish stays clean with no visible sensor housing, while the microwave detection still reads movement in the room below.