Single technology micro-motion occupancy sensor system

A micro-motion occupancy sensor system that monitors for a presence of a person in a room, in different monitoring modes, to regulate power delivery to the room, the system comprising:

• a multimode lens for receiving passive infrared (IR) energy and focusing the IR energy as a plurality of passive IR beams;
• a pyroelectric detector for receiving the focused IR beams from the multimode lens and generating an electrical signal based on the received, focused IR beams;
• a processing circuit that includes an amplifier and a filter, for processing the resultant electrical signal and generating an interrupt signal and an analog output signal based upon the electrical signal;
• and
• a controller for receiving and processing the interrupt signal and the analog output signal to determine whether a person has entered the room or is maintaining their presence within the room;
• wherein the controller controls the processing in a vacant mode of operation where a person's presence is not detected and in an occupied mode of operation when a person's presence has been detected.