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Manufacturer warranty Description
Features:
- Elegant design
- Dirt and water resistant
- Corrosion resistant construction
- Modified teflon bearing system
- Completely self powered with self contained generator
- One piece molded cup assembly
Applications:
- Research Measurments
- Engineering Studies on wind effects on structures
- Control Anemometer for existing wind warning devices
- Wind Resource Assessment
The A75-104 is the most popular anemometer by reason of its ruggedness and low cost. The A75-104 produces an AC signal whose amplitude and frequency are proportional to wind speed. It has a distance constant of ten feet. The anemometer is injection molded using UV stabilized black Lexan to produce a very rugged and reliable sensor. Hundreds of thousands are in use through out the world. Extensive wind tunnel and field testing has shown this unit to maintain its accuracy remarkably well in field use. These units are used in conjunction with electronic data collection systems or for input to control systems. They are readily combined with meter relays to provide custom controls. Each system is provided with a detailed instruction manual.
Technical details
- Weight 0.1 kg (0.2 lbs)
- Dimensions 3-Cup Conical Cross Section - 51 mm (2 in) diameter Swept Diameter of Rotor - 190 mm (7.5 in) Overall Height - 81 mm (3.2 in) Moment of Inertia of rotor assembly - 68 x 10-6 S - ft²
- Accuracy 5m/s to 25 m/s (11 MPH to 55 MPH) ±0.1 m/s (0.2 MPH)
- Version Uncalibrated
- Operating Temperature -55°C to 65°C (-67°F to 150°F)
- Operating Humidity 0-100% RH
- Electrical Sine Wave Output changes linearly with Wind Speed 60 Hz = 102 MPH Voltage: 2.0 VAC @ 60 cycles Lifetime - 109 Cycles
- Materials Rotor and Housing Body - Injection molded black polycarbonate (Lexan) Shaft - Beryllium Copper (Fully Hardened) Bearing - Modified Teflon, self lubricating Rated PV factor of 20,000 (at 6.7 m/s or 15 MPH, PV is approx. 500; at 45 m/s or 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 (1in) diameter, 13 mm (0.5 in) long, 4 pole
- Threshold Starting - less than 0.75 m/s (1.75 MPH) Cup Distance Constant - 3.0m (10 ft)(63% recovery)
- Gust Survival Speed 232 MPH
- Lifespan 3-5 Years under normal conditions
- Transfer Function MPH = (Hz x 1.714) + 0.725
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