NRG Class 1 Anemometer
The NRG Class 1 anemometer is the ideal, low-cost solution for wind resource assessment projects that require an anemometer with class 1A compliance.
The NRG Class 1 Anemometer is a ball-bearing version of our industry-leading NRG 40C Anemometer. That is, it relies upon the same compact external form factor for easy transport and installation. Inside, the patented dual shaft design of the NRG Class 1 protects the bearings from debris and the common impact loads experienced in harsh climates, while the bearings themselves deliver the low friction necessary to achieve certified class 1 performance.
NRG was the first company to obtain endorsement in the classification of an anemometer from Troels Pedersen of the DTU Wind Energy Department. A calibration certificate comes with each sensor, verifying its traceability to the National Institute of Standards and Technology (U.S.A.): Download Calibration Report.
Specifications Print Specs
|MEASNET Calibrated (#5966)||CPH MEASNET Calibrated (#5967)|
|Sensor type||3-cup anemometer||3-cup anemometer|
|Sensor range||1 m/s to 96 m/s (2.2 mph to 215 mph) (highest tested)||1 m/s to 96 m/s (2.2 mph to 215 mph) (highest tested)|
|Instrument compatibility||All NRG Systems data loggers||All NRG Systems data loggers|
|Signal type||Low level AC sine wave, frequency linearly proportional to wind speed||Low level AC sine wave, frequency linearly proportional to wind speed|
|Anemometer Transfer Function||
|Output voltage at threshold||80 mV (peak-to-peak) minimum||80 mV (peak-to-peak) minimum|
|Output voltage at 60Hz||
|Calibration||Each anemometer individually calibrated, calibration reports provided via electronic download||Each anemometer individually calibrated, calibration reports provided via electronic download|
|Output signal range||0 Hz to 125 Hz (highest recorded)||0 Hz to 125 Hz (highest recorded)|
IEC 61400-12-1 Classification
IEC 61400-12-1 Classification
|Threshold||0.79 m/s (1.77 mph) per ASTM D 5096-02||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)||190 mm (7.5 inches)|
|Mounting||Onto a 13 mm (0.5 inch) diameter mast with cotter pin and set screw||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||0.25 inch nut driver, petroleum jelly, electrical tape|
|Operating temperature range||-55 °C to 60 °C (-67 °F to 140 °F)||-55 °C to 60 °C (-67 °F to 140 °F)|
|Operating humidity range||0 to 100% RH||0 to 100% RH|
|Connections||4-40 brass hex nut/post terminals||4-40 brass hex nut/post terminals|
|Weight||0.14 kg (0.3 lbs)||0.14 kg (0.3 lbs)|
|Cups||One piece injection-molded black polycarbonate||One piece injection-molded black polycarbonate|
|Body||Housing is electrically conductive black ABS plastic||Housing is electrically conductive black ABS plastic|
|Shaft||Hardened 400 series stainless steel||Hardened 400 series stainless steel|
|Bearing||Ball bearings||Ball bearings|
|Magnet||Indox 1, 25 mm (1 inch) diameter, 13 mm (0.5 inch) long, 4 poles||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||Single coil, bobbin wound, 4100 turns of #40 wire, shielded for ESD protection|
|Boot||Protective PVC sensor terminal boot included||Protective PVC sensor terminal boot included|
Mon – Fri: 8:30am – 5:00pm Eastern Time (GMT-5)
Extend and retrofit NRG booms to meet your project’s needs with our boom extensions and adapter kits.
Sensor Calibration Service
Use these services to recalibrate anemometers available from NRG.
Sensor Cable Kit - 2C
Use this two-conductor (2C) cable for unheated anemometers.
Symphonie® SCM Card
Condition your sensor’s output signal so that a SymphoniePLUS3 Data Logger can read it by installing a Symphonie Signal Conditioning Module (SCM).