Automatic shut-off controls, including occupancy sensors and time-clock devices, switch lamps on or off. Occupancy sensors turn lights on or off based on the existence of a person in the space controlled by the sensor. The sensor detects motion either through changes in the infrared radiation pattern or actively through detection of reflected ultrasonic pressure waves or microwave signals. The sensors are designed to monitor small areas but can be linked together to control the lights in a large area. Time clocks turn lights on or off based upon a specified, set schedule.

These controls can be implemented through the use of building automation systems, energy management systems, individual time clocks, wallbox mounted devices and various combinations of relays, sensors and control panels. Because the lamps are not dimmed, the increased cost of the dimming ballast and controller is avoided.

Automatic shut-off controls are ready for widespread installation, but some barriers remain. Penetration into commercial and industrial applications can be increased, particularly if market transformation groups, specifiers, government agencies and manufacturers collaborate to help reduce the remaining barriers to the use of this established control technology.

Learn more about Automatic Shut-off Controls:

For more information:

• Overcoming Barriers to Widespread Use of Lighting Controls in Commercial/Industrial Applications - Part I: Automatic Shut-off Controls
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  Overview and discussion of the barriers to greater use of automatic shut-off controls