Check the listing for details. Tork Nsi OSC20U Ceiling Mount Ultrasonic Occupancy Sensor 2000 foot coverage. Condition: New. Listed at 104.00 USD. NEW Tork OSC20U Ceiling Mounted Ultra Sonic Occupancy Sensor. We purchased this for $226.87. 24V DC, 360° and 2000 ft Coverage with Ecosetting for Energy Efficiency Applications: Offices and hotelsClassroomsConference roomsLavatoriesHallways Features: OPERATION: Automatic ON and automatic OFF based on occupancy detection.OFF DELAY: Selectable from 8 to 40 minutes.ECOSETTING: Learns typical use patterns and adjusts the OFF delay for the most efficient time.MOTION INDICATION: Green for ultrasonic motion. Indicators may be disabled. Specifications: VOLTAGE: 24VDC.CURRENT CONSUMPTION: 33mA.POWER SUPPLY: TRP-U Power Pack (up to 4 units).ADJUSTABLE TIME DELAY: 8 - 40 minutes.TEST MODE: 8 seconds, upon initial power-up for 1 hour.US COVERAGE: 2000 sq. ft. (adjustable).SENSITIVITY ADJUSTMENT: Individual setting range for ultrasonic of 50% and PIR of 75%.ULTRASONIC OUTPUT: 32HzMOUNTING: Ceiling or box mount.OPERATING TEMPERATURE: 32° to 131°F (0° to 55°C).HUMIDITY: 0 to 95% R.H. non-condensing for indoor use only.Color: White