Vaisala WINDCAP® Ultrasonic Wind Sensor WMT700 Series is a robust and reliable ultrasonic anemometer. It measures surface wind, which is one of the key parameters for meteorology and aviation. The WMT700 Series meets the updated - WMO-No.8 guide, 7th edition - and ICAO requirements.
Accurate and Maintenance-free
The WMT700 series has a durable full steel structure with welded arms, clear north indication, and one-point, quick bayonet-style mounting. It has has no moving parts, and it is resistant to contamination and corrosion. It measures accurately and produces reliable data in demanding wind conditions and climates without periodic or on-demand maintenance.Self-diagnostics and validation of measurement are standard features. The 60-min. average is available for polar coordinates and vectors.
Measurement Based on Ultrasound
The WMT700 series uses ultrasound to determine horizontal wind speed and direction. The measurement is based on transit time, the time it takes for the ultrasound to travel from one transducer to another, depending on the wind speed. The transit time is measured in both directions for a pair of transducer heads. Using two measurements for each of the three ultrasonic paths at at 60° angles to each other, the WMT700 computes the wind speed and direction. The wind measurement is calculated in a way that completely eliminates the effects of altitude, temperature and humidity.
Standard and Heated Models
The sensor operates with a power supply of 9 ... 36 VDC. For the heated model, an additional heating power supply of 24 ... 36 VDC is required. Thermostatically controlled heaters in the transducer heads and arms of the heated model prevent build-up of freezing rain or snow. In addition, accessories are available for mounting and connecting the WMT700. To minimize interference from birds, a bird prevention kit is available.
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