Gill Instruments Limited

Gill Instruments Limited

Model R3-100 - Research Anemometer



The R3-100 anemometer is ideal for scientific research applications, with a fast sampling rate of 100Hz. This 3-axis ultrasonic anemometer is used extensively for the determination of fluxes using the Eddy Covariance method.R3-100 will monitor wind speeds of 0-45m/s at environmental operating temperatures of -40ºC to +60ºC. Analogue, sonic temperature, speed of sound and U,V,W vector outputs are provided as standard, with optional analogue and PRT inputs available.

The R3-100 offers class-leading 3-axis wind measurement in a robust aluminium/carbon fibre construction. This anemometer is also available with an asymmetric sensor head for minimal flow disturbance, more information can be found on the R3A-100 page.

  • 3-axis sonic anemometer providing wind speed and direction data
  • 100Hz Data Output Rate
  • 0-45m/s wind speed
  • 0-359º wind direction range (no dead band)
  • Ideal for Eddy Covariance Studies
  • Free data logging software
  • U, V, and W vector outputs
  • Speed of sound and sonic temperature outputs
  • Robust aluminium/carbon-fibre casing

Wind Speed Specifications

  • Range: 0-45m/s
  • Accuracy: <1.0% RMS
  • Resolution: 0.01m/s

Wind Direction Specifications

  • Range: 0-359º
  • Accuracy: <±1.0º RMS
  • Resolution:

Speed of Sound

  • Range: 300 - 370m/s
  • Resolution: 0.01 m/s
  • Accuracy: < ±0.5% @ 20ºC


  • Ultrasonic Output Rate: 100Hz
  • Output Formats: UVW, Speed of Sound

Digital Output

  • Communication: RS422 full duplex, 8 data bits, 1 stop bit, no parity
  • Baud Rates: 2400 - 115200
  • Output Rate: Selectable 0.4 to 100Hz

Analogue Outputs (via supplied PCIA unit)

  • Quantity: 7 (U,V,W, SOS, PRT plus 2 analogue inputs)
  • Sampling: ±10, ±20, ±30, ±60 m/s
  • Update Rate: 0.4 to 100Hz
  • Range and Resolution: ±2.5V, 14 bits
  • Accuracy: <0.25% of FSR

Analogue Inputs (via optional SIU)

  • Quantity: 6 differential inputs
  • Sampling Rate: 100Hz
  • Range and Resolution: ±5V, 14 bits
  • Accuracy: <0.1% of FSR

PRT Input (via optional IU, PRT100 not included)

  • Input Resolution: 0.01ºC
  • Input Accuracy: <0.01ºC (0ºC to +50ºC), <0.15ºC (-40º to +60ºC)

Inclinometer (optional)

  • Range and Resolution: ±20ºC, 0.01º
  • Null Repeatability: ±0.15º
  • Accuracy: ±0.3º (-10º to +10º of inclination)

Power Requirement

  • Anemometer: 9-30V DC <4W (<150mA @ 24V DC or 300mA @ 12V DC)


  • Material: Aluminium / Carbon Fibre
  • Weight: 1.0 Kg
  • Size: 750mm x 240mm


  • Protection Class: IP65
  • Operating Temperature: -40ºC to +60ºC
  • Precipitation: 300mm/hr
  • EMC:  Emissions BS EN 50081-1 :  1992 (Emissions), Immunity BS EN 50082-1 :  1997 (Immunity)

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