Pros and Cons of Cooling Flow Meter

A cooling flow meter measures the movement of a fluid in a pipe or duct.

A cooling flow meter measures the movement of a fluid in a pipe or duct. So in this meter’s most natural shape, gas flows past a heated speed sensor and a temperature sensor. Then the method works to maintain a constant difference of 50 degrees Celsius between the gas and the heated sensor.

As the gas flows past the heated sensor, its particles steal some heat, forming a cooling effect. So the watts required to keep the temperature variation between the two sensors are directly equal to the mass flow rate. And the amount of heat lost relies on the thermal features and flow rate of the gas.

Thermal mass flow meter benefits and limitations

Here, we have listed some of the pros and cons of the cooling flow meter.


  • No moving components
  • High sensitivity
  • Wide variety of pipe sizes


  • Sensitive to gas formation
  • Delicate calibration
  • Sensitive to contaminated liquids

Fast facts

  • A cooling flow meter uses molecular heat transfer to hold the liquid mass flow rate.
  • It has a heated speed sensor and a temperature sensor.
  • Fluid reaching the heated sensor cools the sensor.
  • This cooling effect is equal to the fluid’s speed.
  • But the fluid’s thermal features, amount, and the rate at which it can transport heat impact this effect.
  • You can get the mass flow rate by holding the temperature variation between the heated and temperature sensors.
  • The watts required to sustain the temperature variation are directly equal to the fluid’s mass flow rate.
  • These tools measure without needing pressure and temperature compensation or flow machines.
  • Thermal mass flow meters are the only through gas mass flow meters other than Coriolis meters.

What are the conditions of this flow analysis?

  • It can only hold the gas. The operator calibrates the meter.
  • Not reliable when having wet gas.
  • Variability during periods of rapid temperature variations

Which applications are most apt for thermal flow meters?

  • Holding natural gas flow to combustion causes for energy management and environmental recording
  • Submetering natural gas for cost accounting, method performance, as well as tenant billing
  • Airflow analysis for combustion air or compressed air

Common pitfalls encountered when using cooling flowmeters?

  • End-user views the length of the straight run, which affects the flow profile.
  • The flow profile in the insulation must be the same as the calibration flow profile.

Critical challenges for using thermal flow meters in flare gas analysis?

  • Rapid variations in flow rates and take over the material.
  • Change in gas formation at factories and petrochemical plants.

How can an end-user ensure the meter best meets the needs of the use?

  • Give the flow meter operator the flow rate and temperatures, pressure, gas production, piping system terms, and hold pipe straight run and variations.


To sum up, these are the advantages and disadvantages of the cooling flow meter. These cooling flow meters are used to regulate the flow of liquid by controlling its temperature. Proteus is the leading manufacturer in producing the best devices.