anemometer is an instrument for measuring fluid velocity, whether it be of
gases or fluids, hot wire or hot film, anemometers measure fluid speed using
a delicate probe made of thin tungsten/platinum wire, or a thin metallic film.
This probe is heated to a temperature higher than average temperature of the
fluid. Using sophisticated circuitry, the anemometer stabilizes and maintains
the probe temperature at a constant level throughout the measurement. Since
the fluid flowing past the probe has a lower temperature than the probe, the
film/wire is constantly being cooled by the fluid flow. The higher the velocity,
the faster the rate of cooling.
Since the anemometer must maintain the probe temperature at a constant level, it is therefore sensitive to the rate at which it is being cooled, i.e., the fluid velocity. This velocity is translated to a continuously changing voltage which has a nonlinear relationship with the flowing fluid. This voltage then undergoes signal conditioning, to filter out noise and improve the Signal/Noise ratio.
After proper calibration of the probe channels, it is possible to measure fluid velocities with an accuracy of 0.05% or greater, depending upon the measurement range and the quality of the calibration. The response time between measurement and instrument output is very short in comparison with other methods of fluid flow measurement and can reach a minimum of 1/2 microsecond.
The AN-2000 Anemometry system measures at that speed up to 16 channels simultaneously!
AN-2000 High Speed USB2 Interface
For more information about our Hot-Wire Anemometry products , please click here.