The precise wind sensor calculates wind speed and direction using the run-time differential approach. It provides output for instantaneous values, vector and scalar means, the maximum gust of wind and wind direction, the maximum/minimum values and the virtual temperature.
The Lufft Ventus can output data through serial or analog interfaces, making it compatible with PLC systems and widely available hydrometeorological dataloggers. Even in the coldest temperatures, an automatic heater guarantees steady operation.
Image Credit: OTT HydroMet GmbH – Meteorology
Image Credit: OTT HydroMet GmbH – Meteorology
- Parameters calculated: Wind speed, virtual temperature, wind direction, barometric pressure
- Measurement technology: Ultrasonic
- Product highlights: Measurement that requires no maintenance and is appropriate for harsh environmental conditions, operates without ice or vibration and has compatible interfaces
- Interface: SDI-12, RS-485, numerous RS 485 protocols, analog output
Advantages
- Seawater and vibration resistance that is useful in coastal areas
- An inbuilt heater that can be activated in the event of a frost threat ensures ice-free operation down to -40 °C
- Maintenance-free operation — There are no moving parts that can wear out, and recalibration is not necessary, thanks to the ultrasonic measurement technique
- Accomplished testing and certification under challenging circumstances (air humidity, temperature, electromagnetic compatibility, salt spray, vibration, and icing)
- Appropriate for all climate zones and for solar-powered automatic meteorological stations
- OTT-dataloggers, widely available HydroMet dataloggers and PLS systems are compatible with built-in data pre-processing, global interfaces, and configurable output protocols
Examples of Use
The sturdy, maintenance-free wind sensor is intended for use in all climate zones in commercial meteorological applications. Even in harsh environmental circumstances, it produces reliable data.
Examples
- Synoptical involuntary weather stations of meteorological services
- Hydro-meteorological stations
- Mountain weather stations for avalanches and flood warning
- Weather stations at airports, onboard ships, and marinas
- Wind turbine control
- Weather surveillance for road and traffic control systems
Technical Data
Source: OTT HydroMet GmbH - Meteorology
| |
|
| Data |
|
| Measured |
Wind speed, wind direction, virtual air temperature, barometric pressure |
| Calculated |
Instantaneous values in intervals from 1 to 10 seconds, vector and scalar means in intervals from 1 to 10 minutes
max/min values of the wind direction sectors
Maximum gust of wind and wind direction, virtual temperature |
| Wind speed |
|
| Measuring method |
4 x 10 Hz ultrasonic sensors |
| Measuring range |
0 ... 75 m/second |
| Resolution |
0.1 m/second |
| Accuracy |
±0.2 m/second or ±2% RMS |
| Threshold |
0.1 m/second |
| Wind direction |
|
| Measuring method |
4 x 10 Hz ultrasonic sensors |
| Measuring range |
0 ... 359,9° |
| Resolution |
0.1° |
| Accuracy |
< 2° (> 1m/second) RMSE |
| Threshold |
0.1 m/second |
| Virtual air temperature |
|
| Measuring method |
ultrasonic technology |
| Measuring range |
-50 ... +70 °C |
| Resolution |
0.1 °C |
| Accuracy |
±2 K (no heating, no solar irradiation, or wind speed above 4 m/second) |
| Barometric pressure |
|
| Measuring method |
MEMS-Sensor, capacitive |
| Measuring range |
300 ... 1200 hPa |
| Resolution |
0.1 hPa |
| Accuracy |
±1.5 hPa |
| Electrical data |
|
| Interfaces selectable using the Lufft-Config tool (PC-SW for Windows OS) |
|
| SDI-12 |
release 1.3 (factory setting) |
| RS-485 |
galvanically isolation, halb-duplex, baud rates 1200 ... 19200 |
| RS-485 protocols |
binary, ASCII, TLS2002FG3, MODBUS, NMEA-WIMWV |
| Analog output |
4 ... 20 mA or 2 ... 10 VDC, 16 bits |
| Power supply |
|
| Input voltage |
10,5 ... 28 VDC |
| Power consumption (sensor) |
50 mA @ 12 VDC |
| Heater |
24 VDC/240 Watt |
| Ambient |
| Operating temperature range |
-40 °C ... +60 °C (with heater), -20 °C ... +60 °C (without heater) |
| Storage temperature |
-55 °C ... +80 °C |
| Relative humidity |
0 ... 100% R.H. |
| Mechanical data |
|
| Dimensions (H x Ø) |
170 mm x 150 mm |
| Weight |
| Material |
seawater resistant AlMg3Si aluminum alloy |
| Color |
| Fastener (Ø) |
| Protection and standards |
|
| Type of protection |
| Standard |
| EMC directive |
2004/108/EG |
| Emitted interference |
EN 55011:2009, EN 61000-6-3 |
| Immunity |
EN 61000-6-6 and EN 61000-4-2/3/4/5/6/8 |
| Vibration |
IEC 60068-2-6/IEC 60945 |
| Salt spray |
MIL-Std 810, 509.3 |
| Ice |
MIL-Std 810F, 521.2 |