Testo | Flow Measurement

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To measure the flowrate in ventilation and in air-conditioning systems

There are different types of devices used to measure the air flow in ventilation systems. The anemometer is the most used one and it can be employed in many areas. For example, in the industry there are sectors where flow measurement plays an essential role: not only in conduits, but also in air outlets and in air filters. You can use an helical anemometer, a thermal anemometer or a volume flow hood; it depends on the circumstances. Therefore, it is important to learn the differences between those instruments in order to choose the most suitable for your requirement.

These are the areas where flowmeters can be useful:

  • Conduits measurements
  • Air intakes measurements
  • Comfort level analysis
  • Air filters measurements
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Flowrate measurement – in those situations it’s particularly important

In order to decide which flowrate instrument is the right one it’s useful to learn its different application fields. It is often employed for conduits measurement to check air speed. Ventilation duct is one of the most important elements for air-conditioning and ventilation systems. A flow-rate meter can be useful to check that feature.

An efficient system is necessary not only for air-conditioning implants: it can also be very important for air intakes conduits. That’s why air intakes measurements are another factor to consider for flow-rate measurement. In this case a anemometer can be really helpful, because even the smallest volumetric flow-rate variations can affect the entire system. 

However, not just the air-conditioning systems have to be efficient: it is often understimated the importance of air speed of the different rooms. The wellness experienced in a setting depends on the current climatic settings such as temperature, humidity and air speed. In those environments a thermal anemometer is often employed. But also a helical anemometer can be a good choice in order to achieve valid results.

Regarding flowrate measurement, it is worth it to go back to air-conditioning systems. Those are equipped with a filter, which is advisable to check periodically for an optimal performance. Filters measurement can be done through an anemometer. In that way it is possible to prevent the dirt from crossing the filter, reaching the environments and compromising the indoor climate.

These are the anemometers for flowrate and other features measurements:


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Anemometers – useful tools

Flowrate measurement can be challenging if you don’t own the appropriate tools. Therefore, if you need a flowrate meter it is important to recognize which values you want the instrument to detect.

A classic wind speed meter has a different equipment from a thermal anemometer or a volume flow hood. Obviously the flowrate measurement is possible through different tools; however, different tools provide different results. For example, an helical anemometer can calculate an average both over time and a current one, skill that climatic measurement tools don’t have.

These latter, on the other hand, have many more application fields. They can measure flowrate, but also temperature, pressure, humidity and heat. In this way it will be possible to analyze precisely the surrounding environment so it is possible to react promptly in case of variations.

These are the most important characteristics of a flowrate meter:

  • High sensitivity for data measurements
  • Quick analysis into a system
  • Easy to use

Measuring wind speed – if you want to calculate its intensity

It is also possible to make outdoor wind speed measurements. There are different areas in which this is a very important factor. Wind speed meter is projected to make spot measurements. About that, Testo tools not only can implement a unit, but they can also work with different unities. Palette anemometer is a very effective example. Depending on the model, it can offer several visualisations. It consents to choose between Windchill calculation or the Beaufort one, as well as kts, km/h, m/s or fpm and mph values.


 

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Measuring flowrate easily

Let’s go back to indoor flowrate measurements. The anemometer is a good choice in this field as well. An helical anemometer or the combination of it with an anemometer with an helical probe makes volumetric flowrate and air speed measurements possible.

Measuring ranges reveal the measurable air speed. But flowrate can be measured also with a differential manometer that – in the best scenario – is assembled on a ventilation shaft and then makes the measurement. It is possible to need other accessories too in order to make a flowrate measurement. Those accessories are included in Testo offering.

Benefits of flowrate measurements through anemometer:

  • Indoor flowrate measurements
  • Calculus and forward of the measured values
  • Possibility of analisys (for some patterns)