UL 2075 BULLETIN-2007《气体和蒸气探测器和传感器UL安全性标准.评议提交截止日期: 2006年2月19日》

These requirements cover toxic and combustible gas and vapor detectors and sensors intended to be portable or employed in indoor or outdoor locations in accordance with the National Electrical Code, NFPA 70. A gas detector and/or sensor and/or vapor detector, as covered by these requirements, consists of an assembly of electrical components coupled with a sensing means inside a chamber, or by separate components to detect toxic and/or combustible gases or vapors. The detector includes provision for the connection to a source of power and signaling circuits. These requirements cover the following types of detectors: a) Detectors intended for monitoring the environment and detectors intended for open area protection and for connection to a compatible power supply or control unit for operation as part of gas detection or emergency signaling systems; b) Detectors intended solely for control of ventilation or shut off devices such as fans or control valves; c) Detectors intended for both th