DIN Standards Committee Gas Technology
Gas meter - Thermal-mass flow-meter based gas meter
Abstract
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, that are used to measure volumes of fuel gases of the 2nd and/or 3rd family, as given in EN 437:2021, and non-conventional gases, including up to 20% hydrogen/gas blends and 100% hydrogen. In general, the term “thermal mass flow meters” applies to a flow-measuring device using heat transfer to measure and indicate gas flowrate, as defined in ISO 14511. NOTE 1 Although the word “mass” is present in the definition of the measurement principle, gas meters covered by this document provide measurement of gas at base conditions of temperature and pressure. These meters have a maximum working pressures not exceeding 0,5 bar and a maximum flowrate not exceeding 160 m3⋅h−1 over a minimum ambient temperature range of −10 °C to +40 °C and a gas temperature range as specified by the manufacturer with a minimum range of 40 °C.
Begin
2025-11-21
WI
00237047
Planned document number
prEN 17526 rev
Responsible national committee
NA 032-02-05 AA - Gas measuring
Responsible european committee
CEN/TC 237/WG 10 - Thermal-mass flow-meter based gas meters
previous edition(s)
Gas meter - Thermal-mass flow-meter based gas meter
2025-04
