The VENTUS is an Ultrasonic anemometer with a 240W heater and metal housing. It is extremely precise and maintenance-free measurement of wind velocity and wind direction as well as calculation of acoustic virtual temperature.

Model: 8371-UM

• Robust design and precise measurements allow for efficiency and accuracy of project control.
• The VENTUS wind sensor is ideal for renewable energy applications.

VENTUS belongs to Lufft's WS family of professional intelligent sensors with digital and analog interfaces. The ultrasonic wind sensor is designed without mechanical parts as they have been used with traditional “cups and vanes”. The digital or analog output delivers instantaneous, average, min or max value with flexible measuring rate. The VENTUS is heated in case reaching critical ambient conditions. It is made for cold climates!

Recommended for:

• Wind turbines
• Marine/ships
• Meteorology
• Building automation
  

The following outputs are available:

• NMEA
• ASCII
• UMB
• 4... 20 mA, 0...10V
• SDI12
• MODBUS (ASCII, RTU)
  

To read more information on this product, please Click Here.

Features

Technical Data

Additional Equipment

• General Information
  Operating temperature	-40..+60°C (with heating)
  Bus operation	up to 32 devices
  Operating voltage electronics	24 VDC ±10 % or 24 VDC/1.2 VA
  with heating	24 VDC, max. 240 VA (140 W + 100 W)
  Connection	8 pole plug
  Housing material	Anodized aluminium, seawater-proof
  Protection	IP 65
  Pole diameter	50 mm / 2"
  Factory certificate	yes
  Jarring test	According to IEC 60945

• VENTUS-UMB	8371-UM
  Dimensions	Ø approx. 150 mm, height approx. 200mm
  Weight	approx. 1.7kg
  Wind direction
  Principle	Ultrasonic- 2.4Ghz
  Measuring range	0.1…359.9°
  Resolution	0.1°
  Accuracy	±2° RMSE >1.0m/s
  Start-up Threshold	0.1m/s
  Wind speed
  Principle	Ultrasonic- 2.4Ghz
  Measuring range	0…75m/s
  Resolution	0.1m/s
  Accuracy	±0.2m/s or ±2% of reading, whichever is greater
  Start-up Threshold	0.1m/s
  Unit	m/s; km/h; mph; kts
  Virtual temperature
  Principle	Ultrasonic
  Measuring range	-58...+158°F (-50°C...+70°C)
  Resolution	0.1 K
  Accuracy	±2.0K (without heater and without sun exposure)
  Measuring rate	60 partial measurements/15 full measurements per second
  Measurement output rate	1-10 seconds adjustable, default 10s
  Air pressure
  Principle	MEMS Capacitive
  Measuring range	300…1200 hPa
  Accuracy	±0.5 hPa
  Data output digital
  Interface	RS 485 semi-/full duplex, isolated
  Baud rate	1200-57600
  Measurement rate instantaneous value	1-10s
  Measurement Avg (arithmetic, vector), Min, Max	1-10min
  Status	Heating, sensor failure
  Data output analog
  only semi-duplex mode
  output signal	4-20mA, 0...10V frequency (instantaneous, avg, min, max)
  Load	max.300 Ohm
  Resolution	16bit

• Accessories:
  Surge protection	8379-USP-V
  Power supply 24V/10A	8366-USV2
  Connection cable Ventus/V200A, 15m incl. connector, $222.50	8371-UK015
  Connection cable Ventus/V200A, 50m incl. connector, $353.75	8371-UK050
  Connector Ventus/V200A, $51.25	8371-UST1