Process Control Devices manufactures the Thermal Mass Flow Meter, available in India, that measures the flow rate of gases in the process and utility pipelines. The use of thermal dispersion technology enables direct measurement of mass flow without requiring any external compensation in terms of pressure and temperature in most cases. There are no moving parts in this flow meter, whi... https://www.pcd-flowmeter.com/flow-meter/thermal-mass-flow-meter-manufacturer