Product code: WS1 | WS2 | WS3 | WS4
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The WindSonic wind speed and direction sensor is based on proven ultrasonic technology from Gill Instruments. This 2-axis ultrasonic wind sensor is maintenance-free and easy to install and, combined with the WS-15A display, SpaceLogger.W10 and Weather-File Web Site, delivers the ultimate in highly accurate 'plug and go' wind speed and direction monitoring.
The WindSonic solid-state ultrasonic technology provides many advantages over conventional cup anemometers and vane sensors. Having no moving parts that can jam, break or wear out makes it the sensor of choice for harsh weather conditions and remote locations when you need to know you can just fit and leave without fear of failure or damage that occurs with traditional cup and vane sensors.
The perfect choice for remote, offshore or long term monitoring, the corrosion free exterior eliminates costly maintenance and servicing procedures.
There are four sensor options with different outputs:
WindSonic Option 1 sensors that only transmit using RS232 standard communications are suitable when the connection distance between the sensor and the WS-15A display/SpaceLogger.W10/PC is less than 20 metres and the electrical environment is benign.
WindSonic Option 2 sensors use the more robust RS422/RS485/NMEA communication standard, used for connection distances in excess of 20 metres, or where there may be heavy duty electrical equipment being switched or in operation in the vicinity.
WindSonic Option 3 sensors use RS232 or RS422/RS485/NMEA and analogue outputs, used when an analogue output is specifically required. Note if used with our WS15A display output must be set to RS422/485. Analogue output type may be selected from 0-5V, 0-20mA or 4-20mA.
WindSonic Option 4 sensors have SD1-12 output. Features include power power consumption (<2mA in standby) and a vector or scalar rolling average function providing 1 minute average and 1 minute max. speed with associated direction.
The WindSonic sensors are ideal for use with our WS-15A display unit providing a local IP67 rated backlit display for a 'real time' view of wind speed and direction. Our SpaecLogger.W10 (WindLogger) or SpaceLogger.W8.Wireless data loggers deliver compact and affordable data acquisition. The SpaceLogger.W8.Wireless logger allows live transfer of the data for view on our Weather File website.
A WindSonic connector is required for wiring to the sensor.
WindSonic can be configured using the free software provided to select the output rate and units of measurement that suit the application.
WindSonic automatically transmits an anemometer status code with each output to indicate its operating status. This ensures accuracy and reliability.
To change the setting of a WindSonic sensor from the default factory settings, it is possible to communicate with the sensor direct from a PC using HyperTerminal (or similar terminal emulation package).
Use the WindSonic RS232 Configuration Cable for easy connection to a PC and power supply.
The WindSonic sensor uses the time of flight method of air velocity measurement.
There are four ultrasonic transducers arranged as two pairs at right angles to each other. Each pair is used to measure the component of the wind in the direction between the transducers.
For example if one pair is on a North South line and the other pair is on an East West line then the North South component VN and the East West component VE are measured. These are then combined to give the actual wind speed and direction.
Wind angle A = arctan ( VE / VN )
Wind speed S = sqroot ( VE 2 + VN 2 )
To look at how the component measurements are done we will take the example of the North South transducer pair:
A pulse of ultrasonic sound is transmitted by the North transducer and the time T1 it takes to travel to the South transducer is accurately measured. The time T2 is then measured for an ultrasonic pulse to travel in the opposite direction from the South transducer to the North transducer. These times are affected by the wind blowing along the line between the transducers. For example if there is some wind blowing from a Northerly direction, then the time taken for the ultrasonic pulse to travel from N to S will be shorter than from S to N.
The time for the pulse to travel from N to S is given by
T1 = L / ( C + VN )
and the time for the pulse to travel from N to S is given by
T2 = L / ( C - VN )
L is the distance between the transducers and
C the speed of sound
From this the northerly component of the wind can be found from
VN = L ( 1/T1 - 1/T2 ) / 2
and the speed of sound from
C = L ( 1/T1 + 1/T2 ) / 2
The WindSonic default serial output is as follows:
Q is the anemometer identifier. Can be set to any character Q to Z
DDD wind direction in degrees relative to sensor axis
SSS.SS wind speed
U Units M m/s, N knots, P mph, K km per hour, F ft per min.
AA status 00 ok, 01 axis 1 failed, 02 axis 2 failed, 04 axis 1 & 2 failed, 08 NVM error, 09 ROM error
CC checksum Exclusive OR of all characters between <STX> and <ETX> as a two character hexadecimal value.
<STX> is the ASCII character with a value of 2
<ETX> is the ASCII character with a value of 3
<CR> is the ASCII carriage return character with a value of 13
<LF> is the ASCII line feed character with a value of 10
Data is output at 9600 baud with 8 data bits and no parity.
Details of other output options and configuration instructions are given in the user manual supplied with WindSonic.
|Physical||Dimensions||142mm diameter x 160mm|
|Mounting||Pipe mounting 1.75 in (44.45mm) diameter|
|Material||LURAN UV stabilised black thermoplastic|
|Performance||Wind speed||Range||0 to 60 m/s (116 knots, 134 mph)|
|Accuracy||±2 % @ 12m/s|
|Threshold||0.01 m/s (0.02 mph)|
|Response time||0.25 sec|
|Wind direction||Range||0 to 359º (no dead band)|
|Accuracy||±3º @12 m/s|
|Response time||0.25 sec|
|Outputs||WindSonic Option 1||RS232|
|WindSonic Option 2||RS232
|WindSonic Option 3||RS232
Analogue 0-5V, 0-20mA or 4-20mA
|Output rate||0.25, 0.5, 1,2 or 4 outputs per second (Hz)|
|Parameters output||Polar wind speed and direction or U & V Vectors, anemometer status|
|Units||kt, m/s, km/h, mph, ft/min|
|Serial output format||Polar (speed and direction)
UV (2 axis, signed speed) or
Marine NMEA 0183 v3 sentence MWV
|Serial output baud rate||2400, 4800, 9600, 19200 or 38400|
|click on the Overview tab for details of the default serial output|
|Power||Power requirements||WindSonic 1 & 2||5 to 30 V dc
|WindSonic 3||7 to 30 V dc|
|From 5.5 mA @ 12 V|
|Start up time||<5 seconds|
|Environmental||Temperature||Operating range: -35ºC to +70ºC
Storage range: -40ºC to +80ºC
|Humidity||Operating range: <5% to 100% RH|
|EMC||EN 61326: 1998|
|Quality system||Manufactured within ISO9001 quality system|
|The manufacturer reserves the right to amend the specification and therefore the information in this document may be subject to change|
View or download the documentation in PDF format.
The following accessories are available with your WindSonic ultrasonic sensor.
Click on the items below for more information.
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Ultrasonic anemometer for wind speed & direction with robust aluminium construction & optional heating
Hand-held weather meter for wind speed, temperature, barometric pressure & altitude
Digital display of wind speed & direction & MetPak weather data, with wind speed alarm & RS232 data output
Time-stamped data logging of wind & weather data to SD memory card
MetPak measures wind speed & direction, air temperature, relative humidity, dew point and barometric pressure
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