Universal flow monitors inc, usa, offers flow stream mass flowmeters. It can be used to monitor non-aggressive gases. Since there are no moving parts, these monitors can be used for precise flow measurement. They work on the principle that when a gas flows through a laminar element the pressure difference is linearly proportional to the flowrate. These flowmeters measures flows from 5 to 300 scfh. All standard gases such as air, nitrogen, helium, argon and carbondioxide can be measured.
