Thermal mass flow meters ("also known as thermaldispersion or immersible mass flow meters" 1. ) measure the the mass flow rate of liquids, gases or steam directly. Procon Instrument Technology supply quality thermal mass flowmeters from Sierra Instruments. 

 

QuadraTherm 640i Thermal mass flow meter by Sierra Instruments   QuadraTherm 780i - Thermal mass flow meter by Sierra Instruments   Steel Mass 640S gas flow measurement by Sierra Instruments   Sierra 780S Flattrack Thermal Flow Meter   Sierra Flattrak 780S UHP Flowmeter

QuadraTherm 640i

 

QuadraTherm 780i

 

SteelMass 640S

 

FlatTrak 780S

 

FlatTrak 780S-UHP

Industry's Most Accurate Air / Gas Thermal Insertion Mass Flow Meters    Highest Air/Gas Mass Flow Measurement Accuracy in Industry    Accurate Metering of Peak, Low Flow and Total Mass Flow Rate    Inline Thermal Mass Flow Meters with Flow Conditioning   Industry-Choice For Bulk High Purity Gas Custody Transfer To Semicon Fabs
                 
BoilerTrak 620S-BT Thermal Mass Flowmeter by Sierra Instruments   Fast Flo 620S gas flow measurement by Sierra Instruments    Chlorine Trak 760S Thermal Flow meter by Sierra Instruments   Multi Trak 670S Flow meter by Sierra Instruments   OEM Thermal Sensor by Sierra

 BoilerTrak 620S-BT

 

FastFlo 620S

 

ChlorineTrak 760S

 

 MultiTrak 670S

 

 OEM Probe Only Thermal Sensors

 Insertion Thermal Mass Flow Meter for Boiler & Heater Efficiency   Fast-Response Insertion Thermal Mass Air Flow Sensor     Cost-Effective Chlorine Gas Mass Flow Meters Made From Kynar    Multi-Point Gas Mass Flow Meters for Large Ducts and Stacks    Custom Packaged Thermal Mass Flow Sensors
                 

1.Wikipedia https://en.wikipedia.org/wiki/Thermal_mass_flow_meter