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

Endress+Hauser LPGmass D8EB LPG Coriolis flowmeter for refueling and distribution applications
Endress+Hauser LNGmass D8LB Coriolis flowmeter for LNG cryogenic refueling applications
Fluke 922 Airflow Meter/Micromanometer for HVAC airflow measurement
Fluke 922 HVAC airflow meter for differential pressure and air velocity testing