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NRG S1 Anemometer

The NRG S1 Anemometer is a class 1 sensor that reduces measurement uncertainty and project cost for wind resource assessment and power performance testing.

  • NRG S1 Anemometer
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Configuration Options

The NRG S1 Anemometer provides a unique balance of high accuracy and low cost, making it ideal for reducing measurement uncertainty in wind resource assessment campaigns as well as power performance tests. A proven bearing system and a rugged, metal body design ensure the sensor will operate reliably for many years, in a variety of environmental conditions.

Classification

The NRG S1 Anemometer is the only wind energy anemometer classified to both editions of the IEC 61400-12-1 standard, enabling straightforward comparisons against both new and legacy anemometers.

IEC 61400-12-1

Edition 1 (2005)

Edition 2 (2017)

Class A

1.21

1.27

Class B

3.86

4.19

Class C

N/A

4.15

Class D

N/A

6.13


View NRG S1 classification report for IEC 61400-12-1 Edition 1.0 (SOH Wind Engineering LLC)

View NRG S1 classification report for IEC 61400-12-1 Edition 2.0 (SOH Wind Engineering LLC)

Robustness

More than 60 NRG S1 Anemometers have been field-tested for over a year across a variety of real-world sites. DNV GL has performed an independent verification of the S1 field test. If you are interested in reviewing their technical note, or performing your own analysis of the underlying field test data, please click on the following link:

S1 DNV GL Report

NRG conducted lightning surge testing which showed that the S1 Anemometer’s resistance to damage from surges in electrical current is superior to the other tested class 1 anemometers commonly used in the wind energy industry.

The NRG S1 Anemometer has also been tested extensively to confirm IEC and CE compliance, as well as IP55 ingress protection, the highest IP standard achievable for cup anemometers.

  • IEC-compliant
  • Class 1 wind speed measurements reduce AEP uncertainty
  • Competitive pricing lowers project costs
  • Industry-leading resistance to damage from surges in electrical current
  • Independent field test verification by DNV GL
  • Proven cup geometry and bearing system
  • Metal body for longer sensor life
  • Individual sensor calibrations available from three MEASNET-certified wind tunnels
  • Optional two-per-box packaging reduces shipping costs
  MEASNET Calibrated (#9405) MEASNET Calibrated, SOH CPH (#9415) MEASNET Calibrated, DWG (#9416) MEASNET Calibrated (2) (#14363) MEASNET Calibrated, SOH CPH (2) (#14364) MEASNET Calibrated, DWG (2) (#14365)
Description  
Sensor type 3-Cup Anemometer 3-Cup Anemometer 3-Cup Anemometer 3-Cup Anemometer 3-Cup Anemometer 3-Cup Anemometer
Applications
  • Wind resource assessment
  • IEC 61400-12-1 turbine power curve verification
  • Operational wind farm monitoring
  • Meteorological studies
  • Environmental monitoring
  • Wind resource assessment
  • IEC 61400-12-1 turbine power curve verification
  • Operational wind farm monitoring
  • Meteorological studies
  • Environmental monitoring
  • Wind resource assessment
  • IEC 61400-12-1 turbine power curve verification
  • Operational wind farm monitoring
  • Meteorological studies
  • Environmental monitoring
  • Wind resource assessment
  • IEC 61400-12-1 turbine power curve verification
  • Operational wind farm monitoring
  • Meteorological studies
  • Environmental monitoring
  • Wind resource assessment
  • IEC 61400-12-1 turbine power curve verification
  • Operational wind farm monitoring
  • Meteorological studies
  • Environmental monitoring
  • Wind resource assessment
  • IEC 61400-12-1 turbine power curve verification
  • Operational wind farm monitoring
  • Meteorological studies
  • Environmental monitoring
Sensor range 0.638 m/s to 75 m/s (1.427 mph to 167.8 mph) 0.638 m/s to 75 m/s (1.427 mph to 167.8 mph) 0.638 m/s to 75 m/s (1.427 mph to 167.8 mph) 0.638 m/s to 75 m/s (1.427 mph to 167.8 mph) 0.638 m/s to 75 m/s (1.427 mph to 167.8 mph) 0.638 m/s to 75 m/s (1.427 mph to 167.8 mph)
Instrument compatibility All NRG Systems Data Loggers All NRG Systems Data Loggers All NRG Systems Data Loggers All NRG Systems Data Loggers All NRG Systems Data Loggers All NRG Systems Data Loggers
Measurement range 0.6 to 75 m/s 0.6 to 75 m/s 0.6 to 75 m/s 0.6 to 75 m/s 0.6 to 75 m/s 0.6 to 75 m/s
Output signal  
Signal type Form: Square Wave
Frequency: 532.9 Hz @ 50 m/s (112 mph)
Amplitude: Equal to supply voltage, max. 15 V
Form: Square Wave
Frequency: 532.9 Hz @ 50 m/s (112 mph)
Amplitude: Equal to supply voltage, max. 15 V
Form: Square Wave
Frequency: 532.9 Hz @ 50 m/s (112 mph)
Amplitude: Equal to supply voltage, max. 15 V
Form: Square Wave
Frequency: 532.9 Hz @ 50 m/s (112 mph)
Amplitude: Equal to supply voltage, max. 15 V
Form: Square Wave
Frequency: 532.9 Hz @ 50 m/s (112 mph)
Amplitude: Equal to supply voltage, max. 15 V
Form: Square Wave
Frequency: 532.9 Hz @ 50 m/s (112 mph)
Amplitude: Equal to supply voltage, max. 15 V
Linearity Refer to R^2 value on individual calibration report. Refer to R^2 value on individual calibration report. Refer to R^2 value on individual calibration report. Refer to R^2 value on individual calibration report. Refer to R^2 value on individual calibration report. Refer to R^2 value on individual calibration report.
Anemometer Transfer Function
  • Refer to individual calibration report for anemometer transfer function.
  • All NRG S1 anemometers are calibrated per IEC 61400-12-1, Annex F.
  • Refer to individual calibration report for anemometer transfer function.
  • All NRG S1 anemometers are calibrated per IEC 61400-12-1, Annex F.
  • Refer to individual calibration report for anemometer transfer function.
  • All NRG S1 anemometers are calibrated per IEC 61400-12-1, Annex F.
  • Refer to individual calibration report for anemometer transfer function.
  • All NRG S1 anemometers are calibrated per IEC 61400-12-1, Annex F.
  • Refer to individual calibration report for anemometer transfer function.
  • All NRG S1 anemometers are calibrated per IEC 61400-12-1, Annex F.
  • Refer to individual calibration report for anemometer transfer function.
  • All NRG S1 anemometers are calibrated per IEC 61400-12-1, Annex F.
Calibration Each anemometer individually calibrated at SOH WE, Williston, VT USA.
Calibration reports provided via electronic download.
Each anemometer individually calibrated at SOH CPH, Copenhagen, DK.
Calibration reports provided via electronic download.
Each anemometer individually calibrated at DWG, Varel, DE.
Calibration reports provided via electronic download.
Each anemometer individually calibrated at SOH WE, Williston, VT USA.
Calibration reports provided via electronic download.
Each anemometer individually calibrated at SOH CPH, Copenhagen, DK.
Calibration reports provided via electronic download.
Each anemometer individually calibrated at DWG, Varel, DE.
Calibration reports provided via electronic download.
Output signal range 0 Hz to 800 Hz 0 Hz to 800 Hz 0 Hz to 800 Hz 0 Hz to 800 Hz 0 Hz to 800 Hz 0 Hz to 800 Hz
Resolution 0.046 m/s 0.046 m/s 0.046 m/s 0.046 m/s 0.046 m/s 0.046 m/s
Uncertainty IEC 61400-12-1 Ed. 1 Classification
  • Class 1.2A
  • Class 3.9B
    Refer to individual calibration sheet for information on calibration uncertainty.
    Contact NRG Sales for Ed. 2 classification indices.
IEC 61400-12-1 Ed. 1 Classification
  • Class 1.2A
  • Class 3.9B
    Refer to individual calibration sheet for information on calibration uncertainty.
    Contact NRG Sales for Ed. 2 classification indices.
IEC 61400-12-1 Ed. 1 Classification
  • Class 1.2A
  • Class 3.9B
    Refer to individual calibration sheet for information on calibration uncertainty.
    Contact NRG Sales for Ed. 2 classification indices.
IEC 61400-12-1 Ed. 1 Classification
  • Class 1.2A
  • Class 3.9B
    Refer to individual calibration sheet for information on calibration uncertainty.
    Contact NRG Sales for Ed. 2 classification indices.
IEC 61400-12-1 Ed. 1 Classification
  • Class 1.2A
  • Class 3.9B
    Refer to individual calibration sheet for information on calibration uncertainty.
    Contact NRG Sales for Ed. 2 classification indices.
IEC 61400-12-1 Ed. 1 Classification
  • Class 1.2A
  • Class 3.9B
    Refer to individual calibration sheet for information on calibration uncertainty.
    Contact NRG Sales for Ed. 2 classification indices.
Response characteristics  
Threshold 0.638 m/s (1.427 mph) per ASTM D 5096-02 0.638 m/s (1.427 mph) per ASTM D 5096-02 0.638 m/s (1.427 mph) per ASTM D 5096-02 0.638 m/s (1.427 mph) per ASTM D 5096-02 0.638 m/s (1.427 mph) per ASTM D 5096-02 0.638 m/s (1.427 mph) per ASTM D 5096-02
Distance constant (63% recovery) 2.76 m (9.05 ft) per ASTM D 5096-02 2.76 m (9.05 ft) per ASTM D 5096-02 2.76 m (9.05 ft) per ASTM D 5096-02 2.76 m (9.05 ft) per ASTM D 5096-02 2.76 m (9.05 ft) per ASTM D 5096-02 2.76 m (9.05 ft) per ASTM D 5096-02
Moment of inertia
  • 1.01 x 10-4 kg-m2
  • 74.5 x 10-6 S-ft2
  • 1.01 x 10-4 kg-m2
  • 74.5 x 10-6 S-ft2
  • 1.01 x 10-4 kg-m2
  • 74.5 x 10-6 S-ft2
  • 1.01 x 10-4 kg-m2
  • 74.5 x 10-6 S-ft2
  • 1.01 x 10-4 kg-m2
  • 74.5 x 10-6 S-ft2
  • 1.01 x 10-4 kg-m2
  • 74.5 x 10-6 S-ft2
Installation  
Mounting Onto a 25 mm (1") diameter mast with 2 set screws Onto a 25 mm (1") diameter mast with 2 set screws Onto a 25 mm (1") diameter mast with 2 set screws Onto a 25 mm (1") diameter mast with 2 set screws Onto a 25 mm (1") diameter mast with 2 set screws Onto a 25 mm (1") diameter mast with 2 set screws
Tools required 2.5 mm Allen Key 2.5 mm Allen Key 2.5 mm Allen Key 2.5 mm Allen Key 2.5 mm Allen Key 2.5 mm Allen Key
Environmental  
Operating temperature range -30 °C to 60 °C (-22 °F to 140 °F) -30 °C to 60 °C (-22 °F to 140 °F) -30 °C to 60 °C (-22 °F to 140 °F) -30 °C to 60 °C (-22 °F to 140 °F) -30 °C to 60 °C (-22 °F to 140 °F) -30 °C to 60 °C (-22 °F to 140 °F)
Operating humidity range 0 to 100% RH 0 to 100% RH 0 to 100% RH 0 to 100% RH 0 to 100% RH 0 to 100% RH
Lifespan > 2 years at most sites > 2 years at most sites > 2 years at most sites > 2 years at most sites > 2 years at most sites > 2 years at most sites
Physical  
Connections M12 Connector M12 Connector M12 Connector M12 Connector M12 Connector M12 Connector
Cable length Various available Various available Various available Various available Various available Various available
Weight Sensor weight = 190 grams (0.42 lbs) Sensor weight = 190 grams (0.42 lbs) Sensor weight = 190 grams (0.42 lbs) Sensor weight = 190 grams (0.42 lbs) Sensor weight = 190 grams (0.42 lbs) Sensor weight = 190 grams (0.42 lbs)
Dimensions
  • 3 cups of conical cross-section, 51 mm (2") dia.
  • 204 mm (8") overall assembly height
  • 3 cups of conical cross-section, 51 mm (2") dia.
  • 204 mm (8") overall assembly height
  • 3 cups of conical cross-section, 51 mm (2") dia.
  • 204 mm (8") overall assembly height
  • 3 cups of conical cross-section, 51 mm (2") dia.
  • 204 mm (8") overall assembly height
  • 3 cups of conical cross-section, 51 mm (2") dia.
  • 204 mm (8") overall assembly height
  • 3 cups of conical cross-section, 51 mm (2") dia.
  • 204 mm (8") overall assembly height
Materials  
Cups One piece injection-molded black polycarbonate One piece injection-molded black polycarbonate One piece injection-molded black polycarbonate One piece injection-molded black polycarbonate One piece injection-molded black polycarbonate One piece injection-molded black polycarbonate
Body Anodized Aluminium Anodized Aluminium Anodized Aluminium Anodized Aluminium Anodized Aluminium Anodized Aluminium
Shaft Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel
Bearing Ball Bearings Ball Bearings Ball Bearings Ball Bearings Ball Bearings Ball Bearings
Signal generator Optical Switch Optical Switch Optical Switch Optical Switch Optical Switch Optical Switch