IEC 62990-1:2019规定了设计、功能和性能的一般要求，并描述了适用于便携式、可运输和固定设备的试验方法，用于检测和测量工作场所大气和其他工业和商业应用中的有毒气体和蒸汽的浓度
本文件适用于连续传感设备，其主要目的是提供指示、报警和/或其他输出功能，其目的是指示大气中是否存在有毒气体或蒸汽，在某些情况下启动自动或手动保护动作。 适用于有气体时传感器产生电信号的设备
本文件适用于两种类型的设备:
？HM型（健康监测）“职业接触”设备:
对于职业暴露测量，性能要求的重点是职业暴露限值（OELV）区域内气体浓度测量的不确定度。测量上限将由制造商根据4.2.1定义
？SM型（安全监测）“通用气体检测”设备:
对于一般气体检测应用（例如，安全警告、泄漏检测），性能要求的重点是报警信号。制造商将根据设备的预期用途确定测量上限
一般来说，HM型设备的精度要求高于SM型设备。同一设备可同时满足HM型和SM型的要求
对于用于检测多种气体存在的设备，本文件仅适用于有毒气体或蒸汽的检测。
本文件不适用于设备:
–具有不可逆指示的采样器和浓缩器，如吸附剂或纸带
–用于测量与爆炸风险相关的气体和蒸汽
–用于测量氧气
–仅在实验室用于分析或测量
–仅用于过程测量目的
–用于家庭环境
–用于环境空气污染监测
–用于开路（视线）区域气体测量；
–用于停车场或隧道的通风控制。

IEC 62990-1:2019 specifies general requirements for design, function and performance, and describes the test methods that apply to portable, transportable, and fixed equipment for the detection and concentration measurement of toxic gases and vapours in workplace atmospheres and other industrial and commercial applications.
This document is applicable to continuously sensing equipment whose primary purpose is to provide an indication, alarm and/or other output function the purpose of which is to indicate the presence of a toxic gas or vapour in the atmosphere and in some cases to initiate automatic or manual protective action(s). It is applicable to equipment in which the sensor generates an electrical signal when gas is present.
This document applies to two types of equipment:
？ Type HM (Health Monitoring) ‘occupational exposure’ equipment:
For occupational exposure measurement, the performance requirements are focused on uncertainty of measurement of gas concentrations in the region of Occupational Exposure Limit Values (OELV). The upper limit of measurement will be defined by the manufacturer in accordance with 4.2.1.
？ Type SM (Safety Monitoring) ‘general gas detection’ equipment:
For general gas detection applications (e.g. safety warning, leak detection), the performance requirements are focused on alarm signalling. The upper limit of measurement will be defined by the manufacturer according to the intended use of the equipment.
In general, the requirements for accuracy will be higher for Type HM equipment than for Type SM equipment. The same equipment may meet the requirements of both Type HM and Type SM.
For equipment used for sensing the presence of multiple gases this document applies only to the detection of toxic gas or vapour.
This document is not applicable to equipment:
– with samplers and concentrators such as sorbents or paper tape having an irreversible indication;
– used for the measurement of gases and vapours related to the risk of explosion;
– used for the measurement of oxygen;
– used only in laboratories for analysis or measurement;
– used only for process measurement purposes;
– used in the domestic environment;
– used in environmental air pollution monitoring;
– used for open-path (line of sight) area gas measurement;
– used for ventilation control in car parks or tunnels.