Occupancy sensors come in many styles, are inexpensive and easy to put in.

感应开关有很多种类，也并不昂贵而且也易于安装。

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The system uses information from occupancy sensors to turn off lights in vacant areas of the building.

此系统运用占位传感器掌握到的信息关闭建筑无人区的照明设施。

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Occupancy sensors are used as an energy conservation strategy for both lighting and mechanical systems.

感应传感器被用于照明和机械系统的节能策略中。

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About 93 percent of 3, 040 large U.S. hospitals used one or more day lighting or lighting conservation features, including tinted window glass (80 percent), reflective window glass (39 percent), external overhangs or awnings (47 percent), skylights or atriums designed to provide light (57 percent), automatic controls or sensors that increase or reduce lighting in response to the level of natural light (14 percent), and occupancy sensors that reduce lighting when rooms are unoccupied (46 percent).

FORBES: Heal Thy Self: U.S. Hospitals Are Huge Energy Hogs