NRG #40C Anemometer, Calibrated, With Boot
Model Number : 1900
The NRG #40C anemometer is the industry standard anemometer used worldwide. NRG #40C anemometers have recorded wind speeds of 96 m/s (214 mph). Their low moment of inertia and unique bearings permit very rapid response to gusts and lulls. Because of 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. The #40C is constructed of rugged Lexan cups molded in one piece for repeatable performance. A rubber terminal boot is included.
A calibration certificate verifying that the sensor is traceable to the National Institute of Standards and Technology (USA) is available through electronic download.
Description
| Sensor type | 3-cup anemometer |
|---|---|
| Applications |
|
| Sensor range | 1 m/s to 96 m/s (2.2 mph to 215 mph) (highest recorded) |
| Instrument compatibility | all NRG loggers |
Output signal
| Signal type | low level AC sine wave, frequency linearly proportional to wind speed |
|---|---|
| Anemometer Transfer Function |
|
| Output voltage at threshold | 80 mV (peak-to-peak) minimum |
| Output voltage at 60Hz |
|
| Calibration | each anemometer individually calibrated, calibration reports provided via electronic download |
| Output signal range | 0 Hz to 125 Hz (highest recorded) |
| Uncertainty | Accuwind (Riso-R-1556) Classification:
|
Response characteristics
| Distance constant (63% recovery) |
|
|---|---|
| Moment of inertia |
|
| Swept diameter of rotor | 190 mm (7.5 inches) |
Installation
| Mounting | onto a 13 mm (0.5 inch) diameter mast with cotter pin and set screw |
|---|---|
| Tools required | 0.25 inch nut driver, petroleum jelly, electrical tape |
Environmental
| Operating temperature range | -35 °C to 60 °C (-31 °F to 140 °F) |
|---|---|
| Operating humidity range | 0 to 100% RH |
Physical
| Connections | 4-40 brass hex nut/post terminals |
|---|---|
| Weight | 0.14 kg (0.3 pounds) |
| Dimensions |
|
Materials
| Cups | one piece injection-molded black polycarbonate |
|---|---|
| Body | housing is black ABS plastic |
| Shaft | beryllium copper, fully hardened |
| Bearing | modified Teflon, self-lubricating |
| Magnet | 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 |
| Boot | protective PVC sensor terminal boot included |
| Terminals | brass |
Have a question? Need help configuring and testing your NRG equipment? We're here to help. NRG Systems products come with five resources for technical support.
Product Documentation
Begin by reviewing the documentation we've prepared.
- Read the manual: The answer to your question may be right there. Please help us to help you more effectively and read through your product's owner's manual first.
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Warranty
If you have checked the documentation, forums, and Knowledge Base and are still having problems with your equipment purchased within the past two years, you will need to contact NRG for a RMA return authorization number to return a defective product. This is the quickest and easiest way to get you back to doing what you are trying to do, measure the wind. Please see NRG Warranty for warranty details and instructions.
Repair Service
If you should need to return an out-of-warranty item for repair, please contact NRG in order to obtain an RMA number. Detailed instructions for returning an item to NRG can be found in the document Returning_Repairs_to_NRG.pdf.
Contact Technical Support
If you've explored all of the above resources and still have questions, we have a crack team of professionals waiting to answer your call or email. We ask that you be sure to use the tools above before contacting us, and we will do our best to assist you.
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NRG Sensor Connections to SymphoniePLUS.pdf (233.78 KB)
SymphoniePLUS Sensor Connection Instructions
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#40C Anemometer Uncertainty.pdf (542.42 KB)
This application note addresses uncertainty and measurement, anemometer classification number and calibration uncertainty.
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NRG #40C Anemometer and NRG Class 1 Anemometer Pulse Count per Revolution.pdf(360.14 KB)
The NRG #40C Anemometer and NRG Class 1 Anemometer employ two (2) pulses per revolution. This Application Note demonstrates the two (2) pulse count per revolution design does not result in a bias in the mean wind speed nor its variance.
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The Maximum Type 40 Anemometer Calibration Project.pdf(283.19 KB)
Thomas J Lockhart, CCM, CNET, April 1998
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Accurate Wind Measurements in Icing Environments.pdf(861.76 KB)
Ice will stop or slow anemometers causing them to report lower than actual windspeeds…