Flowmeters measure rates for variety of gases

Gas mass flowmeters are essential for many applications. Dwyer Instruments’ GFM2, GFM3 and GFM4 series are suitable for measuring flow rates of a wide variety of gases. Each provides ±1% FS accuracy, ±0.25% FS repeatability and can store calibration information for up to 10 gases. Digital RS-232 or RS-485 interfaces allow for easy communication and for multi-drop capability of up to 256 units—RS-485 only. Users can set alarms remotely to alert when high or low flow thresholds are exceeded. Self-diagnostics run at start up and the units have a pressure limit of up to 500 psi. Dwyer Instruments Inc.