名词
中文翻译：被动红外测距仪
同义词：
['passive infrared detector', 'passive infrared sensor']
例句：
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1. The passive infrared rangefinder was used to detect the presence of a person in the room.
被动红外测距仪被用来探测房间内是否有人。
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2. The device is designed to measure the temperature and humidity levels in a room.
该设备旨在测量房间的温度和湿度水平。
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3.The passive infrared rangefinder was used to monitor the activity level of the building's residents.
被动红外测距仪被用来监测建筑物居民的活动水平。