Gill Propeller Anemometer (EPS) (27106 / 27106D)

The YOUNG Model 27106 Gill Propeller Anemometer (EPS) utilizes a fast response helicoid propeller and high quality tach-generator transducer to produce a DC voltage that is linearly proportional to air velocity. Airflow from any direction may be measured, however, the propeller responds only to the component of the air flow which is parallel to its axis of rotation. Off-axis response closely approximates a cosine curve with appropriate polarity. With perpendicular air flow the propeller will not rotate. The output signal is suitable for a wide range of signal translators and data logging devices. The standard Model 27106 with expanded polystyrene (EPS) propeller offers maximum sensitivity at low wind speeds.

The YOUNG Model 27106D Gill Propeller Anemometer (EPS) is a modified version of the Model 27106. It utilizes an optical encoder to produce a square wave, pulsed output, with frequency proportional to wind speed.


Propeller Pitch

  • 29.4 cm wind passage per revolution

Propeller Diameter

  • 22 cm


  • 0-25 m/s (55 mph)


  • ± 1% of reading


  • 0.3 m/s (0.6 mph)

Distance Constant

  • 1.0 m (3.2 ft)

Signal Output

  • Standard (Model 27106): Tach-generator transducer – analog DC voltage proportional to wind component. Polarity indicates rotation direction. 1800 RPM (500 mV) = 8.8 m/s (19.7 mph).
  • Optional (Model 27106D): Photochopper transducer, 10 pulse/rev. 1800 RPM (300 Hz) = 8.8 m/s (19.7 mph).

Power Requirement

  • Standard (Model 27106): Tach-generator is self-powered.
  • Optional (Model 27106D): Photochopper requires 5-15 VDC at 11mA.


  • Overall height w/mounting: 43 cm (17 in)
  • Housing diameter: 2.5 cm (1 in)
  • Propeller diameter: See above
  • Mounting: ¾″ pipe thread adapter with MS type connector (connects to anemometer)


  • 0.5 kg (1.1 lbs)

Shipping Weight

  • 1 kg (2.2 lbs)



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