The Aalborg XFM mass flow meter is designed to work with clean gases. The meters are available in aluminum or stainless steel models. Flow rates can be displayed in 23 different volumetric flow or mass flow engineering units including user specific units. The XFM supports many functions including: a programmable flow totalizer, high and low flow alarm, automatic zero adjustment, 2 relay outputs, jumper selectable 0-5 VDC or 4-20 mA analog outputs, and status LED diagnostics.

The XFM also stores calibration information for up to 10 different gases and supports internal or user-specific k-factors. The digital interface (RS-232, RS-485, or optional Profibus DP) provides access to applicable internal data including: flow, CPU temperature, auto zero, totalizer and alarm settings, gas table, conversion factors and engineering units selection, dynamic response compensation and linearization table adjustment.

The Aalborg XFM supports automatic sensor zero offset adjustment which can be activated locally or remotely via digital interface. The totalizer function calculates the total volume of gas by integrating the actual gas flow rate as a function of time. High and low gas flow alarm limits can be preprogrammed via digital interface. Flow accuracy is ±1% of FS at calibration temperature and pressure with repeatability of ±0.15% of full scale. Maximum gas pressure is 500 PSIG.

Please note that XFM mass flow meters are designed to work only with clean gases. Never try to measure flow rates of liquids with XFM. Calibrations are performed at standard conditions [14.7PSIA (101.4kPa) and 70°F (21.1°C)] unless otherwise requested.