Abstract: A gas flowmeter which is disposed between adjacent sections of a gas piping includes a central elongate housing. This housing includes a central gas passage, a plurality of sensor modules arranged in a row adjacent the central passage, and a distribution strip arranged along the sensor modules to conduct measuring signals therefrom. A plurality of electronic processing units are mounted about the elongate housing and in electrical contact with the distribution strip to process the signals from the modules and to then produce processed signals. These processing units are shell shaped with an open longitudinal side so as to fit onto and about a corresponding portion of the elongate housing. With this construction, a compact, lightweight and easy to repair gas flowmeter is provided.