Ultrasonic Anemometer Thies

Ultrasonic Anemometer Thies – 3D

Model: 4.3830.20.340

Make: Thies Clima

Key Highlights

* The 3D Ultrasonic Anemometer measures the horizontal and vertical components of the wind speed and wind direction. * Measurand : Wind velocity and direction. * Sensor Type: Ultrasonic * Signal Output: Digital (RS 485 / RS 422), Analogue (0 … 20mA / 0… 10V or 4… 20mA / 2… 10V) * Supplied With: 15m cable, Factory test/ Calibration Certificates.

Category: Ultrasonic Anemometer

The Ultrasonic Anemometer 3D consists of 6 ultrasonic transformers, in pairs facing each other at a distance of 200mm. The three resulting measurement paths are vertical in relation to each other. The transformers function both as acoustic transmitters and receivers. The electronic control system is used to select the respective measurement path and its measuring direction. When a measurement starts, a sequence of 6 individual measurements is performed in all 6 directions of the measurement paths in a preselect able timing cycle.

The measuring directions (sound propagation directions) rotate clockwise (looking from above), firstly from top to bottom and then from bottom to top. The mean values are worked out from the 6 individual measurements of the path directions depending on the measuring speed and output rate selected and used to make further calculations. The time required for a measuring sequence is approx. 3.5m sec at +20°C with the maximum measuring speed, which is only limited by the sound velocity over the measurement paths.

Output: Output of the measured values can be either digital and/or analog.

Application

* Meteorology * Climatology * Traffic engineering, aviation and navigation * Indoor flow measurement * And in alpine field of application * As acoustic thermometer

Feature

* Wind velocity in X / Y / Z –direction. * Total wind velocity. * Wind velocity azimuth. * Wind direction azimuth. * Wind direction elevation. * Acoustic-virtual temperature [°C]. * Standard deviation of wind velocity in X / Y / Z- direction. * Standard deviation of the total wind velocity. * Standard deviation of the wind velocity azimuth. * Standard deviation of the wind direction azimuth. * Standard deviation of the wind direction elevation. * Standard deviation of the acoustic-virtual temperature. * Statistic functions such as variance, covariance, turbulence intensity. * Wind velocity X / Y / Z of the gust acc. to WMO. * Wind direction of the gust (elevation) acc. to WMO.