Multi-Technology Occupancy Sensor Offers Bi-Level Switching Leviton's OSSMD Dual Relay Multi-Technology Wall Switch Occupancy Sensors combine bi-level switching with infrared and ultrasonic technology. Ideal in commercial restrooms, the OSSMD-F keeps the exhaust fan on for 10 minutes longer than occupancy to clean air. For flexibility in applications with extreme changes in airflow or temperature, the OSSMD also features a PIR-disable function.
