本文件规定了电池供电的1.5级毛细管热质量流量传感器气体流量计（以下简称流量计）的结构、性能、安全和生产要求和试验。这适用于具有同轴单管或双管连接的仪表，用于测量EN 437:2018中给出的第二和/或第三系列燃料气体的体积。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies requirements and tests for the construction, performance, safety and production of battery powered class 1,5 Capillary Thermal-Mass Flow sensor gas meters (hereinafter referred to as meter(s)). This applies to meters having co-axial single pipe, or two pipe connections, which are used to measure volumes of fuel gases of the 2nd and/or 3rd family, as given in EN 437:2018.All current amendments available at time of purchase are included with the purchase of this document.