Lufft Ventus-UMB Ultrasonic Wind Sensor

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Lufft Ventus-UMB Ultrasonic Wind Sensor

Product Number: 8371.UMT

VENTUS is a robust, maintenance‑free high‑precision wind sensor delivering accurate wind speed, gust, and direction measurements during extreme weather conditions.

Wind Speed

Transducer Heater

Analog Output

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Overview

Overview Benefits Specifications Resources

Overview

VENTUS: Very robust, precise and maintenance-free measurement of wind speed, wind gust and wind direction even in the lowest temperature. The accurate wind sensor uses the run-time differential method for determining the wind speed and wind direction. 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. Data output through serial or analogue interfaces provides compatibility of the Lufft Ventus for commercially available hydrometeorological dataloggers and PLC systems. An automatic heater ensures reliable operation even in the lowest temperature.

Benefits

Suitable for extreme applications

Vibration and seawater resistant, integrated heater guarantees ice-free operation in extremely low temperatures until -40 °C

Versatile

Built-in data pre-processing, universal interfaces and selectable output protocols – compatible with OTT-dataloggers, commercially available HydroMet dataloggers and PLS systems.

Maintenance-free

Maintenance-free operation – no moving parts that can wear out thanks to ultrasonic measuring method; no need for re-calibration.

Specifications

Technical Attributes

Sample rate	Instantaneous: 1 - 10 s Average: 1 - 10 min
Baud rate	1200 - 57600
Weight EU	Approx. 1.6 kg (3.6 lbs)
Factory Certificate	Yes
Analogue Outputs	4 - 20 mA or 0 - 10 V
Resolution EU	Data output: 16 bit Wind Direction: 0.1 ° Wind Speed: 0.33 ft/s Virtual Temperature: 0.2 °F Air Pressure: 0.1 hPa
Transducer Heater	No
Product highlights	Ice-free operation in extreme freezing conditions due to additional transducer heater Maintenance-free measurement Suitable for extreme ambient conditions Vibration and seawater resistant Compatible interfaces
Analogue Ouput Signal	4 - 20 mA or 0 - 10 V or 2 - 2000 Hz
Testing	Jarring Test: According to IEC 60945 Corrosion Test: According to MIL-STD-810 Method 509.3 Ice-free Test: According to MIL-STD-810F Method 521.2 Highly Accelerated Life Test
Analog Output	Yes
Operating voltage	12 - 24 VDC / 1.2 VA (without heating) 24 VDC / 240 VA (140 VA + 100 VA) (with heating)
Dimensions (free text)	Ø approx. 5.9 in (150 mm), H approx. 6.7 in (170 mm)
System Monitoring & Controls: Local Status Indication	Heating, sensor failure
Operating Height	3827 yd (Max) (3500 m)
Ambient Temperature	-40 - +80 °C (-40 - +176 °F)
Diameter, Outer	Ø50 mm (2 in)
Accuracy	Wind Direction: ±2° RMSE 1.0 m/s Wind Speed: ±0.2 m/s or ±2 % RMS of reading (whichever is greater) for 0 - 65 m/s - otherwise ±5 % Virtual Temperature: ±2.0 °C (without heater and without sun exposure or wind 4 m/s) Air Pressure:±1.5 hPa
Measurement technology	Ultrasonic
Casing IP Rating	IP68
Measurement Range EU	Wind Direction: 0 - 359.9 ° Wind Speed: 0 - 295.3 ft/s (0 - 90 m/s) Virtual Temperature: -58 - +158 °F (-50 - +70 °C) Air Pressure: 300 - 1200 hPa
Interface	RS485 semi-/full duplex, isolated
Cable Connection	8 pole plug
Housing material	Aluminium, seawater - proof
Wind Speed	0 - 90 m/s (0 - 295 ft/s)
Bus Operation	Up to 32 devices

Resources

Lufft Ventus-UMB Ultrasonic Wind Sensor

Wind Speed

Transducer Heater

Analog Output

Overview

Benefits

Specifications

Technical Attributes

Resources

White Papers (1)

Software/Firmware (3)

Manuals (7)

Data Sheets (2)

Case Studies (2)

Certificates (1)