Patent ID: 9719823
Date: 2017-08-01
CPC Classifications: G01F

Claim:
1. A gas meter comprising: a gas inlet, a gas outlet and a measuring section, a measuring device arranged in the measuring section, a filtering device, for removing particulate impurities, arranged downstream of the gas inlet, wherein the filtering device is supplied with and purifies only a gas portion which is diverted from a main gas flow, wherein the purified gas portion is subsequently fed to the measuring device arranged downstream of the filtering device, a gas-permeable connection to the main gas flow in the form of a feed opening arranged downstream of the filtering device and upstream of the measuring device, and a backpressure element configured to establish a predetermined air pressure in the measuring section, wherein the purified gas portion is fed back at least in part into the main gas flow upstream of the backpressure element through the feed opening.