Flow Measuring Devices
A laminar flow meter is a highly precise, differential pressure flow meter that uses the phenomenon of the Hagen-Poiseuille law, in which the pressure drop in a fluid in a laminar flow over a certain distance through a cylindrical pipe or between two flat plates is proportional to the volumetric flow rate.
A sonic nozzle is a groundbreaking flow meter that uses the properties of sonic velocity (critical flow) for the flow of gas. Its high precision and excellent reproducibility have already been proven. Sonic nozzles are often used in a range of testing equipment, gas meters and gas flow measuring devices, because of its property of generating a constant flow rate.