High Accuracy Industrial Thermal Mass Flow MeterYou need air flow measurement instruments that provide wide turndown ratio, very low pressure drop, no moving parts, application flexibility and a direct gas mass flow rate measurement. The inline QuadraTherm® 780i is the most accurate thermal mass flow meter for air flow rate measurement on the market today, achieving gas mass flow rate accuracy never before possible, +/- 0.5% of reading above 50% of full scale.