Occupancy Sensors,  The Smart Switch for Lighting. 
Automatic lighting, energy saving technology for residential or commercial applications.
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An occupancy sensor is an energy conservation device designed to detect the presence of human occupants in a given area. Many commercial, industrial and public facilities require them for energy saving benefit. Detecting activity within a certain area, they provide convenience by turning lights on automatically when someone enters a room. They reduce lighting energy use by turning lights off soon after the last occupant has left the room.
Occupancy sensors are "application-sensitive" devices, meaning that most problems in the field are the result of misapplication. you should contact us about it

 
Contact Us for guidelines that can help with occupancy sensor application:

Lighting Occupancy Sensor Controls / Occupancy sensors—indoor lighting controls

Occupancy sensors must be located where they will detect occupants or occupant activity in all parts of the room. There are two types of occupancy sensors: ultrasonic and infrared. Ultrasonic sensors detect sound, while infrared sensors detect heat and motion. In addition to controlling ambient lighting in a room, they are useful for task lighting applications, such as over kitchen counters. In such applications, task lights are turned on by the motion of a person washing dishes, for instance, and automatically turn off a few minutes after the person stops.

Calibrate the sensor. The sensor will be provided with manufacturer-default settings for sensitivity to magnitude of motion and time delay before switching the lights off. The default time delay may be from 30 seconds to 15 minutes. Be sure to calibrate the sensor to specific conditions in the space for best performance.
Lighting occupancy sensors can require a little extra attention to ensure they are operating correctly after installation. A professional installer will inform you on how to minimize the problems.
 

  
Electrically energy efficient lighting.

Interference repeatedly causes the occupancy sensor to falsely believe an occupant is in the room so the lights briefly turn on and then off again multiple times.

     The principle of operation and benefits of occupancy sensors are well understood. By turning off the lights when a space is unoccupied, energy savings can result by eliminating waste. Occupancy sensors can also enhance security and reduce light pollution.
      According to the U.S. Environmental Protection Agency, energy savings can range from 40 to 46 percent in classrooms, 13 to 50 percent in private offices, 30 to 90 percent in restrooms, 22 to 65 percent in conference rooms, 30 to 80 percent in corridors, and 45 to 80 percent in storage areas.
     Due to their relative simplicity and high energy savings, coupled with the requirement in prevailing energy codes for automatic lighting shut-off, occupancy sensors are rapidly becoming a standard feature in new buildings and retrofits.
      State energy codes in the United States must be at least as stringent as the ASHRAE/IES 90.1-1999 standard, which requires automatic shut-off of lighting in commercial buildings greater than 5,000 sq.ft. in size, with few exceptions. Automatic shut-off can be provided by occupancy sensors or programmable time scheduling devices. When occupancy in a space is intermittent or not predictable, occupancy sensors are economical.
      While today’s occupancy sensors offer robust features, proven utility and reliability, they remain application-sensitive devices, which requires a properly educated designer and installer for the controls to be effective. The right occupancy sensor must be selected, it must be properly located and installed, and it must be field-calibrated.
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