#40C Maximum Wind Speed Sensor


NRG's #40C is a MEASNET-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 data loggers. The #40C is constructed of Lexan. A rubber terminal boot is included. In February 2008, the #40C replaced the #40 anemometer.



Measurement Description Wind speed
Signal Type/Output Low-level ac sine wave (pulse)
Operating Temperature Range -55° to +60°C
Operating Relative Humidity 0 to 100% RH
Starting Threshold 0.78 m/s (1.75 mph)
Range 1 to 96 m s-1
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)


Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR800 (retired)
CR850 (retired)
CR9000 (retired)
CR9000X (retired)

Additional Compatibility Information

Data Logger 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 data logger.


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