The CDV15-4 is a field flow computer dedicated to gas flow metering by differential pressure measurement with embedded differential pressure sensor. It is ATEX approved and can measure natural gas and industrial gases. Used with a chromatograph or calorimeter it can also provide an energy metering function. The CDV15-4 operates in standalone mode. It can be used for monitoring and safeguarding metering stations during production, transport, cross-border metering and natural gas storage facilities.