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
|NRG Class 1 Anemometer | MEASNET Calibrated (#5966)||NRG Class 1 Anemometer | 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.
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).
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.