What is an anemometer?

What is an anemometer? An anemometer is a measuring device that is used to measure the flow velocity of gases, wind and air. In addition, it allows you to measure many other additional parameters, such as pressure or temperature. Anemometers can be used as mobile measuring tools, handy as well as large stationary devices cooperating with extensive ventilation systems.

How does an anemometer work?

Wind speed as well as flow speed is a very important factor when inspecting air conditioning systems, ventilation systems and many other areas. Measurements can be made both in the open, as well as in ventilation systems, exhaust systems and air conditioning, as well as everywhere where there is a so-called test of the medium. Volume flow or flow rate, on the other hand, is the amount of gas or liquid that flows through a certain area in literally one second.In fact, this means that the anemometer can be used to measure the flow, i.e. the amount of cubic meters of air that escapes through the shaft ventilation outlet in minutes or seconds. Most often, they are additionally equipped with temperature and humidity meters, very often with extremely precise laser sights. Most of the measurements in the shafts as well as ventilation installations are made with the use of a vane anemometer together with the use of appropriate accessories. Flow rate measurement can also be carried out indoors, for example to determine drafts.

What are the different types of anemometers?

The first type of anemometer is the vane anemometer. On this device, the fans are permanently mounted or in the casing and connected by means of a cable directly to the revolution counter. This construction provides much greater flexibility and convenience in performing all measurements. The anemometer is well suited for measuring lower velocities. The second type of anemometer is the thermo-resistance anemometer. The measured medium flows and also cools down the continuously heated heating element in the probe. When using the change in the heat resistance of the electrically heated element, a measurement is made. Based on this, the meter determines the air speed very accurately. In addition to the flow rate, the anemometer also measures air temperature and many other quantities. to measurements temperature, of course, a suitable temperature sensor is necessary. Such an anemometer has a particularly compact structure and often includes telescopic booms that can reach the elements of the air flow itself from a certain length. The thermo-resistance anemometer is particularly sensitive and can measure very low air velocities, where the measuring range starts from 0.15 meters per second. Another anemometer is the pressure anemometer. Here, the change in pressure in the moving fluid is used for the measurement. The measurement is based on pitot tubes. The tube is bent at the end at an angle of ninety degrees Celsius, and the head of the tube is perpendicular to the direction of flow. A probe of this type is placed in the axis of the pipe and also connected to a differential manometer. The pressure that will be measured with a manometer is the sum of the two components. We are talking about the pressure in the conduit and the accumulation of pressure, which is caused by the inhibition of the stream. The pressure is thus measured as the total pressure.

Choosing the right anemometer

Certainly, a modern anemometer is characterized by many diverse functionalities, such as: cooperation with applications, smartphones, zeroing, calculating the average, multi-point measurement over time and recognizing the direction of flow. Before making a purchase, think about all the circumstances in which the device will be used most often and make your choice in this regard. Certainly, a vane anemometer will work best when measuring the simple wind speed in the garden or to determine the air currents of buildings. On the other hand, for measuring the flow volume of large air transport systems, the anemometer should of course be used together with additional accessories, for example funnels, which will be measured completely thanks to the air flow. Of course, users who perform systematic flow checks or companies that are interested in buying devices such as anemometers are interested in equipment that can boast of the ISO or DKD standard. Thanks to this, we maintain the guarantee of measurement accuracy. It is worth betting on high-quality devices that are offered by experienced manufacturers. We will not regret this purchase for sure. Thanks to this, it will not only be a device showing actual data, but also a device that will serve for many, many years. It is definitely an investment that we will be fully satisfied with.

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