Selection of anemometer probes
There are usually three methods for measuring wind speed: thermal probe, impeller probe, and pitot tube. So how can we choose instruments that are suitable for us when measuring wind speed? What are the three measurement methods suitable for?
In the flow rate measurement range of 0 to 100m/s, we can divide it into three sections: low speed: 0 to 5m/s; Medium speed: 5 to 40m/s; High speed: 40 to 100m/s. The thermal probe of the anemometer is used for measurements from 0 to 5m/s; The blade wheel probe of the anemometer has the most ideal effect in measuring flow velocities ranging from 5 to 40m/s; By using a pitot tube, excellent results can be obtained in the high-speed range.
1. The thermal probe has precise measurement effect, and the wind speed range is generally 0-30m/s.
2. The impeller probe can choose the diameter of the impeller, and different sizes of impellers have different applications. If a large impeller with a diameter of 100mm is selected, the average wind speed in a circular area with a diameter of 100mm can be measured. In addition, the impeller probe can also be attached with a cover to achieve accurate measurement of small air outlet airflow.
3. Pitot tubes are generally used to measure pipeline wind speed and are suitable for high wind speeds. Pitot tubes are generally not recommended for wind speeds below 5m/s.
An additional standard for correctly selecting an anemometer probe is temperature: typically, the temperature used for the thermal sensor of the anemometer is around -20~70 ˚ C. Ordinary blade wheel probes are also between -20 and 70 ˚ About C, but the impeller type probe can be specially designed to withstand 350 ˚ C High temperature. The Pitot tube has the widest range of application for temperature, even the most ordinary probe can withstand 600 ˚ The high temperature of C.
