Demanding flow measurement tasks require a competent partner. Series 4 provides an optimal flow meter for the individual application - reliable and easy to use, with safety in the application in the foreground. Our flow meters are all based on the float principle and, due to their technical properties, are suitable for the exact measurement of gases and liquids. Maximum operational reliability is required particularly on use with aggressive media. Only high quality materials are used on all Series 4 models: The measuring tube made of Duran® glass as well as the materials (PP, PVDF, PFA or PTFE) used for all parts in contact with media make it possible to provide solutions for a very wide range of applications. The Series 4 product range includes flow meters with a standard measuring tube. They are low cost and of versatile application. In addition, specific "custom" solutions are available with special measuring tubes to meet customer specifications for medium, pressure, temperature, density, viscosity and measuring range.