What gases can thermal mass flowmeters measure?

Thermal mass flowmeters can measure most industrial gases including compressed air, nitrogen, oxygen, carbon dioxide, argon, natural gas, and biogas. The t-mass series includes built-in gas type selection for automatic compensation.

What is the advantage of thermal mass over other gas flow technologies?

Thermal mass flowmeters provide direct mass flow measurement without requiring pressure or temperature compensation. They offer excellent turndown ratios (100:1), minimal pressure drop, and can be installed via hot-tap without process shutdown.

Thermal Mass Flow Meters

Direct gas mass flow measurement with Endress+Hauser t-mass technology

±1.5%

Measurement Accuracy

100:1

Turndown Ratio

-40 to +130°C

Temperature Range

t-mass Series

Direct Gas Mass Flow Measurement

Advanced thermal dispersion flowmeters for accurate gas flow measurement without pressure or temperature compensation

t-mass 65

Versatile thermal mass flowmeter for industrial gas applications

Accuracy: ±1.5% of reading

Key Features

Direct mass flow measurement
100:1 turndown ratio
Hot-tap installation capability
No moving parts

Specifications

Flow Range:: 0.05 to 2000 m³/h
Temperature Range:: -40 to +100°C
Pressure Rating:: PN 40 / Class 300
Gas Types:: Air, N₂, O₂, CO₂, Ar, Natural Gas, Biogas

View on Endress+Hauser Website

t-mass A 150

Insertion probe design for large pipe diameters

Accuracy: ±1.5% of reading

Key Features

Large pipe capability (up to DN 1500)
Retractable probe option
Integrated temperature measurement
HART, Modbus, and Ethernet communication

Specifications

Pipe Size:: DN 80 to DN 1500
Insertion Depth:: Up to 350 mm
Process Temperature:: -40 to +130°C
Output:: 4-20 mA, HART, Modbus

View on Endress+Hauser Website

t-mass B 150

Inline design for smaller pipe applications

Accuracy: ±1.0% of reading

Key Features

Inline configuration
No flow conditioning required
Bidirectional flow measurement
Low pressure drop design

Specifications

Line Size:: DN 15 to DN 100
Flow Range:: 0.04 to 600 m³/h
Accuracy:: ±1.0% of reading
Repeatability:: ±0.5% of reading

View on Endress+Hauser Website

Applications

Compressed Air Monitoring

Track compressed air usage for energy management and leak detection

Natural Gas Measurement

Accurate measurement of natural gas flow in distribution systems

Flare Gas Monitoring

Environmental compliance monitoring of flare gas emissions

Biogas Applications

Measure biogas production in wastewater treatment and anaerobic digestion

Why Choose Thermal Mass Flow Measurement?

Direct mass flow measurement without pressure/temperature compensation
Wide turndown ratio (100:1) for excellent low-flow sensitivity
Hot-tap installation capability minimizes process downtime
No moving parts ensures long-term reliability
Integrated gas type selection and compensation
Suitable for wet gas applications with automatic correction

Need Help Selecting the Right Thermal Mass Flowmeter?

Our flow measurement experts can help you choose the perfect solution for your gas measurement application