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Thermal gas mass flowmeters are used for compressed air measurement.

The thermal gas mass flow meter is an excellent choice for compressed air measurement, as it can directly measure mass flow—making it ideally suited for applications like compressed air, where energy management and cost accounting are essential.

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1. Directly measuring mass flow is its greatest advantage. The volume of compressed air changes with temperature and pressure, while the mass remains constant. For energy measurement, cost allocation, and efficiency calculations, mass flow—such as kg/h or Nm³/h—is far more meaningful than volumetric flow under operating conditions (e.g., m³/h).

2. No need for temperature and pressure compensation: Since it directly outputs mass flow rate, there’s no requirement—unlike vortex or orifice plate flowmeters—to install additional pressure transmitters and temperature sensors for complex compensation calculations. This simplifies the system design, reduces overall costs, and eliminates errors caused by improper selection of compensation points.

3. Extremely low pressure loss: The sensor probe is inserted directly into the pipeline, creating virtually no obstruction and resulting in minimal permanent pressure loss. For energy-intensive compressed air systems, this translates into significant energy-saving benefits.

4. Wide Rangeability: Typically up to 100:1, and even higher. This means the same flow meter can accurately measure both the high flow rates when the air compressor is running at full load, as well as the tiny flow rates during periods of low demand—such as at night or on weekends—without "missing a beat."

5. High sensitivity and low trigger flow rate: Capable of detecting even the tiniest leaks (such as a faulty valve or a minuscule leak point), which is crucial for leak detection and energy-saving audits in compressed air systems.

6. Easy installation: Available in a plug-in model, it can be installed simply by drilling a single hole in the pipe—perfect for large-diameter pipelines and retrofitting existing systems.

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