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The 40C was one of the first anemometers designed exclusively for the wind industry.
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
MEASNET Calibrated (#1900) |
CPH MEASNET Calibrated (#4350) | |
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DESCRIPTION |
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| Sensor type | 3 Cup Anemometer | 3 Cup Anemometer |
| Applications |
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| 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 |
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| 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 |
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See individual calibration report |
| Output voltage at threshold | 80 mV (peak-to-peak) minimum | 80 mV (peak-to-peak) minimum |
| Output voltage at 60Hz |
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| 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 (at 96m/s, highest recorded) | 0 Hz to 125 Hz (at 96m/s, highest recorded) |
| Uncertainty | Accuwind (Riso-R-1556) Classification:
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Accuwind (Riso-R-1556) Classification:
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RESPONSE CHARACTERISTICS |
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| Distance constant (63% recovery) |
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| Moment of inertia |
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| Swept diameter of rotor | 190 mm (7.5 inches) | 190 mm (7.5 inches) |
INSTALLATION |
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| 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 |
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| 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 |
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| 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 |
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MATERIALS |
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| 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 |
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