NRG 40H Anemometer
The 40H Anemometer is an unheated three-cup anemometer that provides high precision wind speed measurements.
Details
The 40H is based on the NRG 40C Anemometer, one of the first anemometers designed exclusively for the wind industry. This Hall Effect version is engineered for electrically noisy environments and instrumentation that requires a square wave signal. The 40H is most commonly used as a control sensor, either on small wind turbines or to trigger PV tracker stowing in dangerously high winds.
The 40H’s Hall Effect switch produces a high level square wave voltage signal with a frequency proportional to wind speed. This signal is easy to interface to a wide range of industrial devices including turbine controllers, programmable logic controllers (PLCs), and data loggers. A 5-26V DC excitation voltage with 5 mA of current is required.
Constructed of rugged Lexan cups, the 40H is molded in one piece for repeatable performance. A PVC terminal boot is included with each anemometer for additional protection from the elements.
FAQs (10)
- Converting Anemometer Calibration Report Values from m/s to mph
- Does NRG offer anemometers calibrated under the MEASNET anemometer calibration procedure?
- Effects of Barometric pressure and relative humidity on cup anemometers
- How should I install the sensor boot to keep out water?
- Installing NRG sensors on a lattice tower
- Output signal provided by the #40H
- Transfer function of the #40H
- Using a 40H instead of a regular 40C
- Using very long cables with NRG sensors
- Wind speed-readings are zero
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Accessories
Boom Extensions
Extend and retrofit NRG booms to meet your project’s needs with our boom extensions and adapter kits.
Sensor Cable Kit - 3C
Use this three-conductor (3C) cable for unheated vanes and Hall Effect anemometers.
Sensor Terminal Boot
Protect your sensor terminal from exposure to the elements with a terminal boot.