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Model A75-104 Sine Wave Anemometer

Model A75-104 Sine Wave Anemometer


  • Anemometer for wind resource assessment instrumentation
  • Research measurements in environmental studies
  • Engineering studies on wind effects on structures
  • Control anemometer for new or existing wind warning devices
  • Completely self-powered with self-contained alternator.
  • Very simple, RoHS compliant, elegantly engineered construction
  • Dirt and water resistant, modified Teflon bearing system
  • All corrosion resistant materials
  • Rotor assembly molded in one piece for repeatable performance
  • Frequency output for ease of filtering and long cable runs
  • Professional qualities at a minimum price

Note: Calibration reports available at additional cost.


Accuracy: 11 - 55 MPH + 0.2 MPH (Consensus Standard)

Threshold: Starting threshold - 0.75 m/s (1.75 M.P.H.) Cup distance constant (63% recovery) - 3.O m (1 0 ft.)

Materials: Rotor and housing body are both single piece injection molded black polycarbonate (Lexan) Fully hardened berillium copper shaft; Self-lubricating modified teflon bearings. Rated Pv factor of 20,000 (at 15 mph, Pv is approx. 500; at 100 mph Pv is approx 2,000) Upper Bearing is centered in the plane of cup thrust for optimal loading. Permanent magnet Indox 1, 25 mm (1 in) dia., 13 mm (0.5 in) long, 4 poles

Weight: 0.1 kg (0.2 lb.)

Dimensions: 3 cups conical cross-section - 51 mm (2 in) dia. Swept diameter of rotor - 190 mm (7.5 in) Overall height - 51 mm (3.2 in) Moment of Inertia of rotor assembly = 68 x 10-6 S - ft2

Electrical: Output signal is a sine wave with frequency changing linearly with wind speed - 60 Hz = 102 mph Voltage is 2.0 VAC @ 60 cycles Transfer function: MPH = (Hz x 1.714) + 0.725

Environmental: Operating temperature: -55 to 60oC (-67 to 150oF) Operating humidity range: 0 to 100% RH Gust Survival Speed : 214 MPH Lifespan: 3-5 years under normal conditions



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