Patent ID: 8797159

Claim:
An occupancy sensor configured for detecting expected and unexpected occupancies within a monitored area, said occupancy sensor comprising: (a) a real time clock configured for providing the current time; (b) a memory configured for storing an expected occupancy schedule; (c) a sensor element configured for detecting the actual occupancy of the monitored area; (d) a first dedicated physical indicator light configured for being continuously active when the monitored area is expectedly occupied according to the expected occupancy schedule and being blinkingly active when the monitored area is unexpectedly occupied according to the expected occupancy schedule; (e) a second dedicated physical indicator light configured for being continuously active when the monitored area is expectedly vacant according to the expected occupancy schedule and being blinkingly active when the occupancy of the monitored area is unexpectedly vacant according to the expected occupancy schedule; and (f) a processor configured for: (i) accepting signals from the sensor element and the real time clock, (ii) comparing the actual occupancy of the monitored area to the expected occupancy of the monitored area, and (iii) generating a first signal and a second signal wherein said first signal provides the actual occupancy of the monitored area and the second signal provides whether said actual occupancy matches the expected occupancy.