Diaphragm gas meters are displacement meters where the flow channels are designed to guarantee optimum flow conditions and a low pressure loss. All of this meters are approved for commercial measurement (for billing purposes) of natural gas as well as for custody transfer measurement by the German PTB and to EN 1359 and by German DVGW. They are suitable for measuring natural gas and a variety of technical gases at up to 0.5 bar. Operating temperature range is between -25 gas ° C to +55 ° C. Diaphragm gas meters in the size of the BK-G 1.6 to BK G-100 are standard equipped with a magnetic pulse generator. This allows the subsequent installation of low-frequency (LF pulse) encoder IN-Z61.