We develop and manufacture Venturi tubes and nozzles as individual components or as complete VMF® systems. The VenturiMasterFlow® measuring system, VMF® for short, is used for the precise measurement of air or gas volume and mass flows 100,000 m³/h The flow measurement by means of a Venturi tube or Venturi nozzle is characterized by high measuring accuracies up to 0.5% MW and a fast response time < 10 ms. A further benefit is the high long-term stability of the measuring element.