The CMRB PC Series of On/Off Photocell sensors provide the industry's most intelligent control of lighting for daylight harvesting applications. Ideal for public spaces with windows like vestibules, corridors, or bathrooms; the sensors work by monitoring daylight conditions in a room, then controlling the lighting so as to insure that adequate lighting levels are maintained. The CMRB PC has On/Off lighting control; turning off the lights when sufficient daylight is present and turning them on when additional lighting is necessary. The CMRB PC Series sensors are line powered and can switch loads directly without the need for a Power Pack. The CMRB PC enclosure is specifically designed to mount on the end of a linear fluorescent fixture. To add dimming control to the On/Off control provided by the CMRB PC, see the Technical Data Sheet on the CMR(B) PC ADC sensor.