Offering ±0.8% reading accuracy for field verification/validation, handheld gas mass flow meters offer multi-parameter measurement and multiple true gas calibrations. Backlit color TFT display provides 6 hr continuous operation for flow verification in low-light settings within environmental, manufacturing, and metrology industries. Along with Gas Select™ firmware, solid-state products feature 5 msec meter speeds and live readouts of mass and volumetric flow rates, pressure, and temperature.