NRG 40C Anemometer

The 40C Anemometer offers field-proven measurement accuracy at an economical price.

  MEASNET CALIBRATED (#1900) CPH MEASNET CALIBRATED (#4350)
Description
Sensor type n/a 3-cup anemometer
Applications n/a
  • Wind resource assessment
  • Meteorological studies
  • Environmental monitoring
Sensor range n/a 1 m/s to 96 m/s (2.2 mph to 214 mph) (highest recorded)
Instrument compatibility n/a All NRG loggers
Output signal
Signal type n/a Low level AC sine wave, frequency linearly proportional to windspeed
Anemometer Transfer Function n/a See individual calibration report (similar to #40C)
Output voltage at threshold n/a 80 mV (peak-to-peak) minimum
Output voltage at 60Hz n/a
  • 12 V (peak-to-peak) typical
  • Output amplitude NOT proportional to windspeed
Calibration n/a Each anemometer individually calibrated, calibration reports provided via electronic download
Output signal range n/a 0 Hz to 125 Hz (highest recorded)
Uncertainty n/a Accuwind (Riso-R-1556) Classification:
  • Class 2.4A
  • Class 7.7B
    IEC 61400-12-1 operational standard uncertainty:
  • ± 0.14 m/s at 10 m/s for Class A
  • ± 0.45 m/s at 10 m/s for Class B
  • Refer to calibration sheet for information on calibration uncertainty
  • Refer to application note "#40C Anemometer Uncertainty" for definitions and more information
Response characteristics
Threshold n/a 0.78 m/s (1.75 miles per hour)
Distance constant (63% recovery) n/a 3.0 m (10 feet)
Moment of inertia n/a 68 x 10-6 S-ft2
Swept diameter of rotor n/a 190 m m (7.5 inches)
Installation
Mounting n/a Onto a 13 mm (0.5 inch) diameter mast with cotter pin and set screw
Tools required n/a 0.25 inch nut driver, petroleum jelly, electrical tape
Environmental
Operating temperature range n/a -55 °C to 60 °C (-67 °F to 140 °F)
Operating humidity range n/a 0 to 100% RH
Physical
Connections n/a 4-40 brass hex nut/post terminals
Weight n/a 0.14 kg (0.3 pounds)
Dimensions n/a
  • 3 cups of conical cross-section, 51 mm (2 inches) dia.
  • 81 mm (3.2 inches) overall assembly height
Materials
Cups n/a One piece injection-molded black polycarbonate
Body n/a Housing is black ABS plastic
Shaft n/a Beryllium copper, fully hardened
Bearing n/a modified Teflon, self-lubricating
Magnet n/a Indox 1, 25 mm (1 inch) diameter, 13 mm (0.5 inch) long, 4 poles
Coil n/a Single coil, bobbin wound, 4100 turns of #40 wire, shielded for ESD protection
Boot n/a Protective PVC sensor terminal boot included
Terminals n/a Brass

NRG Systems • 110 Riggs Road • Hinesburg, Vermont 05461 • +1 802-482-2255 • info@nrgsystems.com