Your search for "Thermal Mass Flowmeter" revealed the following:

Fluke 922 Airflow Meter/Micromanometer for HVAC airflow measurement
Fluke 922 HVAC airflow meter for differential pressure and air velocity testing
Endress+Hauser CNGmass DCI CNG Coriolis flowmeter for high-pressure natural gas refueling
Endress+Hauser Proline Prowirl O 200 high-pressure vortex flowmeter for steam and gas measurement