Ultrasonic wind sensor Ventus-UMB

IP68

Overview
The Ventus-UMB ultrasonic wind sensor Lufft provides high-precision measurements of wind speed, gust and direction using the run-time differential method. It delivers instantaneous values, vector and scalar means, maximum gust, minimum/maximum values and virtual temperature. Data output is available via serial or analogue interfaces for compatibility with standard hydrometeorological dataloggers and PLC systems. An optional automatic heater enables reliable operation at very low temperatures down to -40 °C.

Benefits

• Suitable for extreme environments: vibration- and seawater-resistant design; optional integrated heater permits ice-free operation down to -40 °C.
• Versatile interfaces: built-in data pre-processing and selectable output protocols ensure compatibility with common dataloggers and PLC systems.
• Maintenance-free operation: ultrasonic measurement with no moving parts; no routine re-calibration required.

Technical specifications

• Sample rate: Instantaneous 1–10 s; Average 1–10 min
• Baud rate: 1200–57600
• Weight: approx. 1.6 kg (3.6 lbs)
• Factory certificate: Yes
• Analogue outputs: 4–20 mA or 0–10 V
• Resolution: 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: Optional (model variant)
• Analogue output signal: 4–20 mA or 0–10 V or 2–2000 Hz
• Testing: Jarring test (IEC 60945); Corrosion test (MIL-STD-810 Method 509.3); Ice-free test (MIL-STD-810F Method 521.2); Highly Accelerated Life Test
• Operating voltage: 12–24 VDC / 1.2 VA (without heating); 24 VDC / 240 VA (with heating)
• Dimensions: Ø approx. 150 mm, H approx. 170 mm
• System monitoring & controls (local status indication): Heating, sensor failure
• Operating altitude: up to 3500 m
• Ambient temperature: -40 to +80 °C (-40 to +176 °F)
• Accuracy: Wind direction ±2° RMSE (for >1.0 m/s); Wind speed ±0.2 m/s or ±2% RMS (0–65 m/s), otherwise ±5%
• Measurement technology: Ultrasonic
• Casing protection: IP68
• Measurement range: Wind direction 0–359.9°; Wind speed 0–90 m/s (0–295.3 ft/s); Virtual temperature -50 to +70 °C; Air pressure 300–1200 hPa
• Interface: RS485 semi-/full duplex, isolated
• Cable connection: 8-pole plug
• Housing material: Seawater-proof aluminium
• Bus operation: Up to 32 devices