Reliable, Accurate Wind Measurements
Compatible with most Campbell Scientific dataloggers
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The 05103 Wind Monitor is a light-weight, sturdy instrument for measuring wind speed and direction in harsh environments. Its simplicity and corrosion-resistant construction make it ideal for a wide range of wind measuring applications. Manufactured by R. M. Young, this wind monitor is cabled for use with Campbell Scientific dataloggers.

Benefits and Features

  • Compatible with most Campbell Scientific dataloggers
  • Rugged enough for harsh environments
  • Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network
  • Constructed with thermoplastic material that resists corrosion from sea-air environments and atmospheric pollutants
  • Uses stainless-steel, precision-grade ball bearings for the propeller shaft and vertical shaft bearings
  • Ideal for wind profile studies
  • Compatible with the LLAC4 4-channel Low Level AC Conversion Module, which increases the number of anemometers one datalogger can measure
  • The R. M. Young wind monitor family:
    • 05103, standard version
    • 05103-45, rugged, alpine version
    • 05305, more responsive but less rugged version
    • 05106, marine-grade version

Detailed Description

The 05103 Wind Monitor is made out of rigid UV-stabilized thermoplastic with stainless steel and anodized aluminum fittings. The thermoplastic material resists corrosion from sea air environments and atmospheric pollutants. It uses stainless-steel precision-grade ball bearings for the propeller shaft and vertical shaft bearings.

The 05103 measures wind speed with a helicoid-shaped, four-blade propeller. Rotation of the propeller produces an ac sine wave that has a frequency directly proportional to wind speed. The ac signal is induced in a transducer coil by a six-pole magnet mounted on the propeller shaft. The coil resides on the non-rotating central portion of the main mounting assembly, eliminating the need for slip rings and brushes.

Wind direction is sensed by the orientation of the fuselage-shaped sensor body, which is connected to an internal potentiometer. The datalogger applies a known precision excitation voltage to the potentiometer element. The output is an analog voltage signal directly proportional to the azimuth angle.


  • Operating Temperature: -50° to +50°C,
    assuming non-riming conditions
  • Overall Height: 37 cm (14.6 in.)
  • Overall Length: 55 cm (21.7 in.)
  • Main Housing Diameter: 5 cm (2.0 in.)
  • Propeller Diameter: 18 cm (7.1 in.)
  • Mounting Pipe Description:
    34 mm (1.34 in.) OD; standard 1.0-in. IPS schedule 40
  • Weight: 1.5 kg (3.2 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 (63% recovery): 2.7 m (8.9 ft)
  • Output:
    ac voltage (three pulses per revolution);
    90 Hz (1800 rpm) = 8.8 m/s (19.7 mph)

Wind Direction

  • Range:
    Mechanical: 0 to 360°
    Electrical: 355° (5° open)
  • Accuracy: ±3°
  • Starting Threshold at 10° Displacement:
    1.1 m/s (2.4 mph)
  • Damping Ratio: 0.3
  • Damped Natural Wavelength:
    7.4 m (24.3 ft)
  • Undamped Natural Wavelength:
    7.2 m (23.6 ft)
  • Output: analog dc voltage from potentiometer—resistance 10kohms; linearity 0.25%; life expectancy 50 million revolutions
  • Power switched excitation voltage supplied by datalogger



The Wind Monitors can be attached to a CM202, CM204, or CM206 crossarm via a 17953 NU-RAIL fitting or CM220 Right Angle Mounting Bracket. Alternatively, the Wind Monitors can be attached to the top of our stainless-steel tripods 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 datalogger. The LLAC4 allows datalogger control ports to read the wind speed sensor’s ac signals instead of using pulse channels. Dataloggers compatible with the LLAC4 are the CR200(X) series (ac signal ≤1 kHz only), CR800, CR850, CR1000, CR3000, and CR5000.

Datalogger Considerations

The 05103's propeller uses one pulse count channel on the datalogger. 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 05103'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 is present in the CR9000X).

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR5000 CR7X CR9000X

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000
* *

*Measurements are typically processed for output with the Wind Vector instruction, which is not present in the CR500 or CR9000.

Frequently Asked Questions

Number of FAQs related to 05103-L: 13

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  1. This depends on what is broken. Typically, Campbell Scientific can repair the unit, and the user does not have to purchase a new one.

  2. Yes, but this is not a standard product that Campbell Scientific offers. We can, however, order one from the manufacturer (R. M. Young).

  3. The measurement instructions will likely remain the same. However, in addition to the multiplier and offset, the type of pulse may change for the wind speed, and the excitation voltage may change for the wind direction. For an explanation of how the datalogger needs to be programmed, see the instruction manual.

  4. The short answer is less than 0.01 mA. The wind speed signal requires no power. The wind direction portion of the sensor only uses a maximum of 0.5 mA when excited with 5 Vdc, and then it is only on for 0.016 s for every measurement. When the wind direction is measured every second (typical), the average current drain is less than 0.01 mA.

  5. Orientation of the wind monitor is done after the datalogger has been programmed, and the location of True North has been determined. True North is usually found by reading a magnetic compass and applying the correction for magnetic declination, where magnetic declination is the number of degrees between True North and Magnetic North. Magnetic declination for a specific site can be obtained from a USFA map, local airport, or through a computer service.

    1. Using Short Cut, click the applicable wind direction sensor in the Selected Sensors list of the Outputs screen.
    2. The two output options enabled are Sample and WindVector. Select WindVector.
    3. The WindVector instruction has output options. Select an option with mean wind direction in it.
  6. To incorporate a sensor that is compatible with wireless sensor interfaces into a wireless network, a CWS900-series wireless sensor interface is needed, as well as an A205 CWS-to-PC interface to configure it. 

  7. Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:

    • An –LC model has a user-specified cable length for connection to an ET107, CS110, or retired Metdata1.
    • An –LQ model has a user-specified cable length for connection to a RAWS-P weather station.

    If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field in the product’s Ordering information. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.

    If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.

    • –ET models terminate with the connector for an ET107 weather station.
    • –ETM models terminate with the connector for an ET107 weather station, but they also include a special system mounting, which is often convenient when purchasing a replacement part.
    • –QD models terminate with the connector for a RAWS-F Quick Deployment Station.
    • –PW models terminate with the connector for a PWENC or pre-wired system.

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