Lufft Ventus-UMB Ultrasonic Wind Sensor

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Lufft Ventus-UMB Ultrasonic Wind Sensor

Product Number: 8371.UMT

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

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
Ambient Temperature	-40 - +176 °F (-40 - +80 °C)
Analog Output	Yes
Analogue Ouput Signal	4 - 20 mA or 0 - 10 V or 2 - 2000 Hz
Analogue Outputs	4 - 20 mA or 0 - 10 V
Baud rate	1200 - 57600
Bus Operation	Up to 32 devices
Cable Connection	8 pole plug
Casing IP Rating	IP68
Diameter, Outer	Ø50 mm (2 in)
Dimensions (free text)	Ø approx. 5.9 in (150 mm), H approx. 6.7 in (170 mm)
Factory Certificate	Yes
Housing material	Aluminium, seawater - proof
Interface	RS485 semi-/full duplex, isolated
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
Measurement technology	Ultrasonic
Operating Height	3827 yd (Max) (3500 m)
Operating voltage	12 - 24 VDC / 1.2 VA (without heating) 24 VDC / 240 VA (140 VA + 100 VA) (with heating)
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
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
Sample rate	Instantaneous: 1 - 10 s Average: 1 - 10 min
System Monitoring & Controls: Local Status Indication	Heating, sensor failure
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
Transducer Heater	No
Weight EU	Approx. 3.6 lbs (1.6 kg)
Wind Speed	0 - 295 ft/s (0 - 90 m/s)