T-mass – Endress+Hauser Thermal Mass Flowmeter

Measuring principle of the T-mass Thermal Mass Flowmeter

The thermal mass flow measurement principle is based on the heat transfer from a heated object to the flowing medium. The T-mass sensor is equipped with two PT100 temperature sensors:

• • One sensor measures the flow temperature to serve as a reference value.
  • The second sensor is heated and maintained at a fixed temperature difference compared to the reference sensor.

When there is no flow, the heating power is almost zero. When the fluid starts to flow, the heat from the heated sensor transfers to the flow, causing the sensor to cool down. The heat transfer rate is proportional to the flow velocity: the stronger the flow → the faster the cooling → the higher the electrical power required to maintain the temperature difference.

Therefore, the electric current that maintains the temperature difference is the direct measured value of the mass flow.

 Advantages of T-mass Flowmeter

• 1. Direct mass flow measurement without the need for pressure or temperature compensation.
  2. Wide measurement range (turndown ratio up to 1000:1).
  3. High sensitivity at low flow rates.
  4. Fast response to flow fluctuations.
  5. No pressure loss.
  6. Minimal maintenance, no moving parts.

 Applications of T-mass Flowmeter

The T-mass thermal mass flow measurement technology is widely used in many industries:

• Compressed air: measurement of consumption and distribution monitoring.
• CO₂: process control, beverage production, refrigeration.
• Inert gases (argon, nitrogen, rare gases) and industrial gases (oxygen, nitrogen): production & distribution, production monitoring & process control.

With insertion or inline design, Proline T-mass can measure flow even in large pipes, rectangular ducts, or round pipelines, providing a flexible and efficient measurement solution

Portfolio of Endress+Hauser T-mass Thermal Mass Flowmeter

Installation of T-mass Thermal Mass Flowmeter

Endress+Hauser T-mass Thermal Flow Meter

T-mass Thermal Flow Meter in Industrial Gas Plant

Thermal Mass Flow Meter T-mass in Industrial Gas Plant

Thermal Mass Flow Meter T-mass measuring compressed air in Food Processing Plant

Thermal Mass Flow Meter T-mass installed on the air duct pipe

References: Endress+Hauser Thermal Mass Flowmeters