The NRG Systems Class 1 anemometer is a ball-bearing version of the industry-leading NRG #40C anemometer and was designed in direct response to customer requests for Class 1A compliance to IEC-61400-12-1. Exceptional field testing results reinforce confidence in both reliability and repeatability of the data.
For wind resource assessment projects requiring an anemometer with Class 1A compliance, the NRG Systems Class 1 Anemometer is the ideal, low-cost solution.
Revolutionary, patent-pending, dual shaft design protects the bearings from debris and common impact loads experienced in harsh climates, which further extendsthe life of the anemometer.
NRG Systems is the first company to obtain endorsement in the classification of an anemometer from Troels Pedersen of the DTU Wind Energy Department.
A calibration certificate verifying that the sensor is traceable to the National Institute of Standards and Technology (USA) is available through electronic download.
- White Paper, NRG Systems Class 1 Anemometer
- Endorsement of Classification of NRG Class 1 Anemometer
- NRG Class 1 Anemometer Product Sheet
- Anemometer Calibration Report Retriever
|Sensor type||3-cup anemometer|
|Sensor range||1 m/s to 96 m/s (2.2 mph to 215 mph) (highest tested)|
|Instrument compatibility||all NRG Systems data loggers|
|Signal type||low level AC sine wave, frequency linearly proportional to wind speed|
|Anemometer Transfer Function|
|Output voltage at threshold||80 mV (peak-to-peak) minimum|
|Output voltage at 60Hz|
|Calibration||each anemometer individually calibrated, calibration reports provided via electronic download|
|Output signal range||0 Hz to 125 Hz (highest recorded)|
|Uncertainty||IEC 61400-12-1 Classification
IEC 61400-12-1 operational standard uncertainty:
|Threshold||0.79 m/s (1.77 mph) per ASTM D 5096-02|
|Distance constant (63% recovery)|
|Moment of inertia|
|Swept diameter of rotor||190 mm (7.5 inches)|
|Mounting||onto a 13 mm (0.5 inch) diameter mast with cotter pin and set screw|
|Tools required||0.25 inch nut driver, petroleum jelly, electrical tape|
|Operating temperature range||-55 °C to 60 °C (-67 °F to 140 °F)|
|Operating humidity range||0 to 100% RH|
|Connections||4-40 brass hex nut/post terminals|
|Weight||0.14 kg (0.3 lbs)|
|Cups||one piece injection-molded black polycarbonate|
|Body||housing is black ABS plastic|
|Shaft||hardened 400 series stainless steel|
|Magnet||Indox 1, 25 mm (1 inch) diameter, 13 mm (0.5 inch) long, 4 poles|
|Coil||single coil, bobbin wound, 4100 turns of #40 wire, shielded for ESD protection|
|Boot||protective PVC sensor terminal boot included|
Begin by reviewing the documentation we've prepared.
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If you have checked the documentation, forums, and Knowledge Base and are still having problems with your equipment purchased within the past two years, you will need to contact NRG for a RMA return authorization number to return a defective product. This is the quickest and easiest way to get you back to doing what you are trying to do, measure the wind. Please see NRG Warranty for warranty details and instructions.
If you should need to return an out-of-warranty item for repair, please contact NRG in order to obtain an RMA number. Detailed instructions for returning an item to NRG can be found in the document Returning_Repairs_to_NRG.pdf.
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