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Meteo M&R DD & DS series
The DD windvane and DS cup anemometer from Wittich & Visser
are light weight instruments for measuring wind speed and wind direction
contact free. The sensors use a well accepted measuring principle
and profit from digital techniques: a perfect combination of traditional
and modern concepts. Both sensors are ideal for agro-meteorology,
greenhouse automation, HVAC, safety guard regulations, etc.
DD windvane
With this light weight, long life wind vane the wind direction is
measured over the full 360° with a resolution of 0.3° without
dead angle! The angle is measured contact free using the Hall effect.
Using RS232 or RS485 communication the analogue (mA or Volt) outputs
are configurable.
DS cup anemometer
With this three cup anemometer wind speed can be measured up to
30 m/s and higher. The speed is processed contact free using the
Hall effect. The treshold speed is 0,5 m/s. Using RS232 or RS485
communication the analogue (mA or V) outputs can be programmed.
The analogue signals can be scaled to cover any measuring range
between 0 and 60 m/s.
Specifications DD
| Measuring principle |
Hall effect |
| Life expectation |
0,5 m/s |
| Electrical angle |
360° |
| Mechanical angle |
360° without stop |
| Damping ratio |
0,35 |
| Treshold |
1,2..1,5 m/s |
| Linearity |
1% |
| Operating temperature |
-30..+80°C |
| Temperature coefficient |
± 200 ppm/°C |
Specifications DS
| Measuring principle |
Hall effect |
| Air velocity range |
0..60 m/s |
| Treshold |
0,5 m/s |
| Operating temperature |
-30..+70°C |
| Distance constant |
2,2 m |
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