The 40C Anemometer offers field-proven measurement accuracy at an economical price.
DETAILS
The 40C Anemometer has recorded wind speeds of 96 m/s (214 mph). Their bearings and low moment of inertia permit very rapid response to gusts and lulls. Due to their output linearity, these sensors are ideal for use with various data retrieval systems. A four-pole magnet induces a sine wave voltage into a coil, producing an output signal with frequency proportional to wind speed.
Constructed of rugged Lexan cups, the 40C is molded in one piece for repeatable performance. A rubber terminal boot is included with each anemometer for additional protection from the elements.
A MEASNET calibration certificate is available for each sensor: Download Calibration Report.
SPECIFICATIONS PRINT SPECS
| MEASNET Calibrated (#14845) | NRG 40 Anemometer (#14881) | |
|---|---|---|
| DESCRIPTION | ||
| Sensor type | 3 Cup Anemometer | 3 Cup Anemometer |
| Applications | Wind resource assessmentMeteorological studiesEnvironmental monitoring | Solar resource assessmentMeteorological studiesEnvironmental monitoring |
| Sensor range | 1 m/s to 96 m/s (2.2 mph to 215 mph) (highest recorded) | 1 m/s to 96 m/s (2.2 mph to 215 mph) (highest recorded) |
| Instrument compatibility | All NRG loggers | All NRG loggers |
| OUTPUT SIGNAL | ||
| 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 | Consensus Transfer Function: Scale Factor (Slope): 0.765 m/s/Hz (1.711 mph/Hz) Offset: 0.35 m/s (0.78 mph)Refer to the white paper “The Maximum Type 40 Anemometer Calibration Project” for more information on the consensus transfer functionAll NRG 40C Anemometers are calibrated per IEC 61400-12-1, Annex F | Consensus Transfer Function:Scale Factor (Slope): 0.765 m/s/Hz (1.711 mph/Hz)Offset: 0.35 m/s (0.78 mph) Note: Refer to the white paper “The Maximum Type 40 Anemometer Calibration Project” for more information on the consensus transfer function |
| Output voltage at threshold | 80 mV (peak-to-peak) minimum | 80 mV (peak-to-peak) minimum |
| Output voltage at 60Hz | 12 V (peak-to-peak) typicalOutput amplitude NOT proportional to wind speed | 12 V (peak-to-peak) typicalOutput amplitude NOT proportional to wind speed |
| Calibration | Each anemometer individually calibrated, calibration reports provided via electronic download | n/a |
| Output signal range | 0 Hz to 125 Hz (at 96m/s, highest recorded) | 0 Hz to 125 Hz (at 96m/s, highest recorded) |
| Uncertainty | Accuwind (Riso-R-1556) Classification:Class 2.4AClass 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 BRefer to calibration sheet for information on calibration uncertaintyRefer to application note “#40C Anemometer Uncertainty” for definitions and more information | Accuwind (Riso-R-1556) Classification:Class 2.4AClass 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 BRefer to application note “#40C Anemometer Uncertainty” for definitions and more information |
| RESPONSE CHARACTERISTICS | ||
| Distance constant (63% recovery) | 2.55 m (8.37 feet) at 5m/s per ASTM D 5096-022.56 m (8.40 feet) at 10m/s per ASTM D 5096-02 | 2.55 m (8.37 feet) at 5m/s per ASTM D 5096-022.56 m (8.40 feet) at 10m/s per ASTM D 5096-02 |
| Moment of inertia | 1.01 x 10-4 kg-m274.5 x 10-6 S-ft2 | 1.01 x 10-4 kg-m274.5 x 10-6 S-ft2 |
| Swept diameter of rotor | 190 mm (7.5 inches) | 190 mm (7.5 inches) |
| INSTALLATION | ||
| Mounting | Onto a 13 mm (0.5″) diameter mast with cotter pin and set screw | Onto a 13 mm (0.5″) 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 |
| ENVIRONMENTAL | ||
| 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 |
| PHYSICAL | ||
| 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) |
| Dimensions | 3 cups of conical cross-section, 51 mm (2″) dia.81 mm (3.2″) overall assembly height | 3 cups of conical cross-section, 51 mm (2″) dia.81 mm (3.2″) overall assembly height |
| MATERIALS | ||
| Cups | One piece injection-molded black polycarbonate | One piece injection-molded black polycarbonate |
| Body | Housing is black ABS plastic | Housing is black ABS plastic |
| Shaft | Beryllium copper, fully hardened | Beryllium copper, fully hardened |
| Bearing | Modified Teflon, self-lubricating | Modified Teflon, self-lubricating |
| 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 |
| Terminals | Brass | Brass |