Sonic anemometer6/11/2023 With an integrated internal compass, the wind direction output for the sensor automatically calibrates to magnetic north. A 0-1 VDC analog output is also standard. It uses ultrasonic sound waves to determine instantaneous wind speed by measuring how much sound waves traveling between a pair of transducers are sped up or slowed down by the effect of the wind. or other commonly available data acquisition systems. The sonic anemometer was developed in the 1970s. Standard digital outputs for the 30.5 Sonic Anemometer are RS-232, RS-485, and MODBUS RTU, which can easily interface to Met One Instruments, Inc. The unit is field configurable through a very user-friendly software interface, accessed through a serial port. This placement also increases the sensor’s reliability, and longevity as dust, debris, snow, and rain will not directly impact the transducers. Measurement interference is further reduced by the transducers’ location, positioned out of the measurement air stream. The body is slender and aerodynamic, assuring minimal turbulence in the measured air stream. The 30.5 is compact, measuring only 6 inches in diameter and 11 inches high, including the mounting stem. ![]() An optional high-precision compass calibration is available to improve accuracy to ☓ degrees. All-new and built to last, this anemometer utilizes the latest solid-state technology, conserving power, size, and weight, with a power consumption of less than 0.5 W. Campbell Scientific’s CSAT3B 3-D Sonic Anemometer is an update and replacement to the original CSAT3, and remains the 3-D sonic anemometer of choice for eddy-covariance measurements. This rugged sensor operates on the principle of measurement of the speed of sound in air. This ultrasonic anemometer serves for the 2-dimensional capture of the horizontal components of the wind speed and the wind direction as well as the virtual. The 30.5 requires no periodic maintenance or calibration. The 30.5 Sonic Anemometer is designed for ambient wind sensing in harsh environments and industrial applications as a direct replacement for conventional mechanical propeller and cup anemometers, both in terms of performance and cost.
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