The ODS0D uses passive infrared (PIR) technology to monitor a room for occupancy through a segmented fresnel lens. This specialized lens divides the field of view into sensor zone. When a person passes into or out of a sensor zone the sensor detects motion and switches two separate lighting loads ON. The lights will remain ON as long as there is an occupant moving through the sensor zone. The ODS0D-TD has an adjustable 30 minute time delay setting for the first and second relay to comply with CEC Title 24. The second relay is manual-on only.