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Vaisala WS425 Ultrasonic Wind Sensor
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Vaisala WS425 Ultrasonic Wind Sensor for replacing mechanical sensors
Provides the most accurate and maintenance free wind measurements for demanding applications. Ideal for replacing mechanical sensors.
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Product Description
Vaisala WINDCAP Ultrasonic Wind Sensor WS425
Measures wind speed and direction from the smallest breeze to hurricane force gales (0...65 m/s), including gusts
Superior data availability and accuracy in all wind directions due to the patented three transducer layout
Averaging of wind speed and direction
Analog, RS-232, RS-422, RS-485 and SDI-12 outputs
Low power consumption
No moving parts: virtually maintenance free
Stainless steel construction
Heated model available
US National Weather Service relies on Vaisala ultrasonic technology
The Vaisala Ultrasonic Wind Sensor WS425 gives meteorologists an alternative to the cup and vane mechanical sensors. With its continuous data availability, the WS425 is also ideal for a variety of wind measurement applications in aviation, road and railway safety and energy production.
Accurate and maintenancefree
The WS425 has no moving parts, and is resistant to contamination and corrosion. In addition to improving accuracy and the reliability of data in all wind conditions and climates, the WS425 eliminates on-demand and periodic maintenance.
Outputs
SDI-12 provides the most extensive set of commands and calculations. The standard RS-232/485/422 protocol supports NMEA and three other message formats. Analog outputs are available as an option.
Technical Data
Wind speed
Measurement range
serial output 0...65 m/s (0...144 mph, 0...125 knots)
analog output 0...56 m/s (0...124 mph, 0...107 knots)
Starting threshold virtually zero
Delay distance virtually zero
Resolution 0.1 m/s (0.1 mph, 0.1 knots, 0.1 km/h)
Accuracy (range 0...65 m/s) +/- 0.135 m/s (+/-0.3 mph, +/-0.26 knots)
or 3% of reading, whichever is greater
Wind direction
Measurement range 0...360deg
Starting threshold virtually zero
Delay distance virtually zero
Resolution 1deg
Accuracy (wind speed over 1 m/s) +/-2deg
Outputs
Digital outputs type RS232, RS422 or RS485, four different message formats
bit rate adjustable from 1200 to 19200 bit/s available averages RS232: 1 to 9 seconds
SDI-12 Standard Data Interface type 3 wires for ground, signal and supply bit rate fixed 1200 bit/s available averages 1 to 3600 seconds
Analog outputs
wind speed
frequency 5 Hz/mph
voltage 8.0 mV/mph
output impedance 10 kohm
wind direction
simulated potentiometer 0...Vrefrepresents 0...359deg
reference voltage 1.0...4.0 V
output impedance 24 kohm
General
Operating power supply 10...15 VDC, 12 mA typical (analog)
and for heated model 36 VDC +/-10 %, 0.7 A
Operating temperature
WS425 non-heated –40...+55C (-40...+131F)
WS425 heated –55...+55C (-67...+131F)
Material
body stainless steel (AISI 316)
sensor arms stainless steel (AISI 316)
transducer heads silicone rubber
Dimensions
height 355 mm (14")
width 250 mm (10")
depth 286 mm (12")
Weight 1.7 kg (3.7 lbs)