Extremely precise and maintenance-free measurement of wind speed and wind direction.

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V200a Ultrasonic Wind and Direction

Key features

  • Measuring wind direction and speed insusceptibly to bird nesting thanks to roofed construction
  • Built-in data pre-processing, universal interfaces and selectable output protocols – compatible with OTT-dataloggers, commercially available HydroMet dataloggers and PLS systems
  • Maintenance-free operation – no moving parts that can wear out thanks to ultrasonic measuring method; no need for re-calibration
  • Suitable for all climate zones; also for solar-powered automatic meteorological stations
  • Integrated heater that can be switched on if there is danger of frost – guarantees ice-free operation in extremely low temperatures until -40 °C
  • Embedded algorithms that provides the wind speed and direction as actual and averaged values
  • Wind gust calculation regarding WMO

The V200A offers extremely precise and maintenance-free measurement of wind velocity and wind direction as well as calculation of acoustic virtual temperature. The ultrasonic wind sensor is designed without mechanical parts as they have been used with traditional "cups and vanes". The digital or analogue output delivers instantaneous, average, minimum or maximum value with flexible measuring rate.

The V200A is heated so that it can still function in critical ambient conditions. Recommended for: meteorology or building automation. The following outputs/protocols are available: NMEA, ASCII, UMB and 4.. 20 mA analog.

Technical specification

Technical data

Dimensions Ø approx. 150 mm, height approx. 170 mm
Weight Approx. 0.8kg
Permissible ambient temperature -40...60°C (with heating), -20...60°C (without heating)
Supply voltage with heating / without heating 24 VDC, max. 20 VA / 12 V
Bus operation Up to 32 devices
Operating voltage electronics 24 VDC ±10 % or 24 VDC/1.2 VA without heating 12 VDC
Electrical connection 8 pole plug
Housing material Plastic
Protection type IP66
Pole diameter 50mm / 2"
Factory certificate Yes

Data output digital

Interface RS485 semi-/full duplex, isolated
Baud rate 1200 ... 57600
Measurement rate instantaneous value 250 ms; 1-10 s
Measurement rate avg (arithmetic, vector), Min, Max 1...10 min
Status Heating, sensor failure

Data output analogue

Data output analog Only semi-duplex mode
Output signal 0...20 mA, 4...20 mA, 0...10V, 2...10V, 2...2,000 frequency (instantaneous, avg, min, max)
Load Max. 300 Ohm
Resolution 16 bit
Maximum operating height 3500m

Air pressure

Principle MEMS capacitive
Measuring range 300 ... 1200 hPa
Unit hPa
Accuracy ±1.5 hPa (0...40°C)

Wind direction

Principle Ultrasonic
Measuring range 0 ... 359.9 °
Unit °
Accuracy < 3° (> 1m/s) RMSE
Resolution 0.1 °

Wind speed

Principle Ultrasonic
Measuring range 0 ... 90 m/s
Unit m/s
Accuracy ±0.3 m/s or ±3% (0 … 35m/s) RMS (the greater value counts); ±5% (> 35m/s) RMS
Resolution 0.1 m/s

Virtual temperature

Principle Ultrasonic
Measuring range -50 ... 70 °C
Unit °C
Accuracy ± 2.0°C (without heater and without sun exposure or wind > 4m/s)
Resolution 0.1 °K