Product Information - 27106
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RM Young Propeller Anemometer with 08274 EPS Propeller
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Model Cable Length Signal Output
27106 None Tach-Generator Transducer
27106-L Custom Tach-Generator Transducer
 
27106D None Single Direction Photochopper
27106D-L Custom Single Direction Photochopper
 
27106F None Two Direction Photochopper
27106F-L Custom Two Direction Photochopper

Optional 08254 CFT Propeller (Add Suffix "T" to Model Name)

Brochure, Version Date: January 2011  Brochure
Manual, Version Date: March 2009  Manual


General Description

The Model 27106 Propeller Anemometer is a precision air speed measuring instrument. The four blade helicoid propeller drives a miniature tach-generator. Output voltage is directly proportional to the axial component of the wind speed. Signal polarity Indicates direction of propeller rotation. The 27106 Propeller Anemometer is also available with single or dual direction photochopper transducer.

The 27106 Propeller Anemometer is especially suited for measuring the vertical wind component. Since normal wind direction seldom exceeds ±30° from horizontal, propeller response can be calibrated to follow the cosine law within 3% over this range.

Specifications

08274 Expanded Polystyrene Propeller (EPS):
Diameter: 22 cm (8.7 in)
Pitch: 29.4 cm wind passage per revolution
Range: 0-25 m/s (55 mph)
Threshold: * 0.3 m/s (0.6 mph)
Distance Constant: * 1.0 m (3.2 ft)
08254 Carbon Fiber Thermoplastic Propeller (CFT):
Diameter: 20 cm (7.9 in)
Pitch: 30.0 cm wind passage per revolution
Range: 0-35 m/s (80 mph)
Threshold: * 0.4 m/s (0.8 mph)
Distance Constant: * 2.1 m (6.9 ft)
Signal Output: Standard 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 photochopper transducer - Voltage pulse with frequency proportional to wind component. 10 pulses per revolution. 1800 RPM (300 Hz) = 8.8 m/s (19.7 mph)
Power Requirement: Propeller Anemometer with tach-generator is self-powered. Optional photochopper transducer requires 5-15 VDC at 11 mA
Dimensions:
Propeller Anemometer: Overall length with mounting 43 cm (17 in), housing diameter 2.5 cm (1 in), mounts on standard 3/4 in pipe
Weight:
Propeller Anemometer: 0.5 kg (1.2 lbs). Shipping weight 1.8 kg (4 lbs)

* Nominal values determined in accordance with ASTM standard procedures.



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