Rheotherm low gas flow meters provide an easy-to-use technology for measuring gas flow in small lines - typically 1” or smaller at flow rates from a few hundred SCFM down to 25 SCCM.  (For flow measurement in larger pipes and ducts).  These meters give a repeatable reading in mass or standard volume with no external temperature or pressure correction needed.  With no mechanical parts, they are reliable and easy to maintain.  Options for hazardous locations (intrinsically safe/explosion-proof) are available.