Diaphragm meters are available in a range of sizes suitable for small domestic to large industrial applications. These are displacement meters where the flow channels are designed to guarantee optimum flow conditions and a low pressure loss. All of the meters are approved for custody transfer measurement by the German PTB and to EN 1359 by German DVGW. They are suitable for measuring natural gas and a variety of technical gases at up to 0.5 bar.
Turbine meters are flow meters which display the volume flowing through the device in actual cubic meters. The incoming gas is accelerated through the inlet body and strikes the blades of the turbine wheel. The revolutions of the turbine wheel are transferred to an 8-digit roller counter via a multistage gear and a magnetic coupling. All turbine gas meters fulfil international directives and norms for pressure equipment (PED) and explosion protection (ATEX) as well as metrological requirements and directives.
Rotary gas meters are volume measuring instruments for gaseous media and operate according to the displacement principle. With the offtake of gas, a pressure drop between the inlet and outlet of the meter builds up. This causes a torque on the impellers which are connected to each othe via high-precision synchronising wheels. This in turn, causes the diametrically opposed impellers to rotate. During this process, the measuring chambers formed between the impellers and housing are periodically filled and emptied. Rotary gas meters are ideal when high accuracy, a high measuring range and a compact design are required.