05108-45-L40 Wind Monitor-HD, Alpine Version
Reliable, Accurate Measurements with Low Maintenance
Suitable for alpine applications
weather applications supported water applications supported energy applications supported gas flux and turbulence applications supported infrastructure applications supported soil applications supported


The 05108-45-L40 Wind Monitor-HD is a lightweight instrument that measures wind speed and wind direction. It is designed to prevent ice buildup, allowing the sensor to provide you with accurate measurements in harsh alpine conditions that have limited accessibility. Manufactured by R. M. Young, this wind monitor is cabled for use with Campbell Scientific data loggers.

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Benefits and Features

  • Compatible with most Campbell Scientific data loggers
  • Discourages ice-buildup with a black sensor housing that is covered with an ice-resistant coating
  • Extremely long-wearing, corrosion-resistant, oversized ceramic bearings to increase service life many times longer than standard stainless-steel bearings
  • Oversized propeller shaft
  • High-pitch propeller
  • Locking propeller nut
  • Sealed, heavy-duty cable pigtail
  • Rugged enough for harsh environments
  • Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network
  • Compatible with the LLAC4 4-channel Low-Level AC-Conversion Module, which increases the number of anemometers one data logger can measure



Operating Temperature Range -50° to +60°C (assuming non-riming conditions)
Mounting Pipe Description
  • 34 mm (1.34 in.) OD
  • Standard 1.0-in. IPS schedule 40
Housing Diameter 5 cm (2.0 in.)
Propeller Diameter 18 cm (7.1 in.)
Height 40 cm (15.7 in.)
Length 57 cm (22.4 in.)
Weight 1.0 kg (2.2 lb)

Wind Speed

Range 0 to 100 m/s (0 to 224 mph)
Accuracy ±0.3 m/s (±0.6 mph) or 1% of reading
Starting Threshold 1.0 m/s (2.2 mph)
Distance Constant 2.7 m (8.9 ft) 63% recovery
Output AC voltage (3 pulses per revolution)

1800 rpm (90 Hz) = 14.9 m/s (33.3 mph)
Resolution (0.1666 m/s)/(scan rate in seconds) or (0.3726 mph)/(scan rate in seconds)

Wind Direction

Mechanical Range 0 to 360°
Electrical Range 355° (5° open) electrical
Accuracy ±3°
Starting Threshold 1.0 m/s (2.2 mph) at 10° displacement
Distance Constant 1.3 m (4.3 ft) 50% recovery
Damped Natural Wavelength 7.4 m (24.3 ft)
Undamped Natural Wavelength 7.2 m (23.6 ft)
  • Analog dc voltage from potentiometer (resistance 10 kohm)
  • Linearity is 0.25%.
  • Life expectancy is 50 million revolutions.
Voltage Power switched excitation voltage supplied by data logger
Damping Ratio 0.25


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Data Loggers

Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR23X (retired)
CR500 (retired) Measurements are typically processed for output with the Wind Vector instruction, which is not present in the CR500 or CR9000.
CR5000 (retired)
CR510 (retired)
CR9000 (retired) Measurements are typically processed for output with the Wind Vector instruction, which is not present in the CR9000.
CR9000X (retired)

Additional Compatibility Information


The 05108-45-L can be attached to a crossarm via a 17953 Nu-Rail Crossover Fitting or CM220 Right-Angle Mounting Bracket. Alternatively, it can be attached to the top of a CM106B or stainless-steel tripod via the CM216 Sensor Mounting Kit.

Wind Profile Studies

Wind profile studies measure many wind sensors. For these applications, the LLAC4 4-Channel Low Level AC Conversion Module can be used to increase the number of Wind Monitors measured by one data logger. The LLAC4 allows data logger control ports to read the wind speed sensor’s ac signals instead of using pulse channels. Data loggers compatible with the LLAC4 are the CR200(X) series (ac signal ≤1 kHz only), CR800, CR850, CR1000, CR3000, and CR5000.

Data Logger Considerations

The 05108-45's propeller uses one pulse count channel on the data logger. Its wind vane requires one single-ended channel and access to an excitation channel. (The excitation channel can be shared with other high-impedance sensors.)


The 05108-45's propeller is measured by the PulseCount Instruction in CRBasic and by Instruction 3 (Pulse Count) in Edlog. The wind vane is measured by the BrHalf Instruction in CRBasic and by Instruction 4 (Excite-Delay-SE) in Edlog. The measurements are typically processed for output with the Wind Vector instruction (not present in the CR500 or CR9000 but present in the CR9000X).

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