#40C Maximum Wind Speed Sensor


NRG's #40C is a calibrated anemometer primarily intended for wind prospecting applications. A four-pole magnet induces a sine wave voltage into a coil producing an output signal with frequency proportional to wind speed. This signal is measured by our dataloggers. The #40C is constructed of Lexan. A rubber terminal boot is included. In February 2008, the #40C replaced the #40 anemometer.


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Operating Temperature -55° to +60°C
Operating Relative Humidity 0 to 100% RH
Starting Threshold 0.78 m/s (1.75 mph)
Cup Distance Constant 3.0 m (10 ft) 63% recovery
Cup Diameter 5.1 cm (2 in.)
Swept Diameter of Rotor 19.0 cm (7.5 in.)
Overall Assembly Height 5.1 cm (3.2 in.)
Weight 0.1 kg (0.2 lb)


Datalogger Considerations

The #40C is measured by the PulseCount instruction in CRBasic and by Instruction 3 (Pulse Count) in Edlog. The #40C uses one pulse count channel on the datalogger.

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X