The CM PC ADC Series combines the CM PC On/Off Photocell sensor with the CM ADC Automatic Dimming Control sensor to 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 CM PC ADC can be used alone or as part of an occupancy sensor system The sensors are powered with 12 to 24 VAC/VDC and typically operate with a PP20 or MP20 Power Pack; enabling complete 20 Amp circuits to be controlled.