please consulting hot type gas mass flowmeter is gas flow measurement of new instrument, different from other gas flow meter don't need to pressure and temperature correction, direct measurement of the quality of the gas flow, a sensor can be extremely low to high range from range. It is suitable for single gas and fixed proportion multicomponent gas measurement. It is the basis of the principle is a fluid absorption of heat and mass flow speed directly related. The hot gas molecules move impact resistance absorbing take away heat, flow rate, the greater the resistance of the more contact heat molecules, the quantity of heat of absorption, the more heat absorption and some gas molecular number, thermal and the flow characteristics, use this one principle, and rely on a large number of advanced technology, we developed a high reliability, fight pollution, stability, and excellent gas mass flowmeter.