GENEQ > Meteorology > Wind Speed
| Ultrasonic Wind Sensors |
| model WMT700 WINDCAP® |
| Applications |
| 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. |
| Descriptions |
| 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 otherthe 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. |
| Features |
| - WMO and ICAO compliant - Measurement range up to 75 m/s - Data output rate 0.25 s - Heating up to 150 W - Self-diagnostics and validation - Max. 3600-second average - Bird cage - IP66 and IP67 - Stainless steel structure - Robust EMC design - Maintenance-free - Can be mounted upside down - Patented three-transducer layout provides accurate data - Large transducers provide high ultrasound power - Data format outputs: polar coordinates and vectors - Wind gust calculated according to the WMO guidelines - Fully compensates effects of temperature, humidity and pressure - US National Weather Service relies on Vaisala WINDCAP® technology |
| Easy to install |
| The WMT52 is delivered fully
assembled and configured from
the factory. With the Vaisala
Configuration Software Tool you
can change the settings, such as
averaging times, output mode, update
intervals, measured variables and
message contents. The WMT52 can be mounted either on top of a pole mast or on a cross arm. When using the optional mounting kit, the north alignment needs to be performed only once. |
| Heating |
| The optional heating available in the
WMT52 assists measurements in
the freezing weather conditions and
during snowfall. As the heating circuit is independent of the operational power, separate supplies can be used. Heating is switched on automatically at low temperatures, well before the freezing point. |
| Proven Vaisala performance |
| The Vaisala WINDCAP® Ultrasonic
Wind Sensor WMT52 incorporates
decades of Vaisala experience in
wind measurement using ultrasound
to determine horizontal wind speed
and direction. With no moving parts, the WMT52 has high sensitivity as the measurement time constant and starting threshold are virtually zero. This makes it superior to the conventional mechanical wind sensors. The WMT52 is designed to operate without periodic field calibration and maintenance. |
| Specifications |
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