NRG 40H Anemometer

The 40H Anemometer is an unheated three-cup anemometer that provides high precision wind speed measurements.

  NRG 40H ANEMOMETER (#5930) MEASNET CALIBRATED (#2551)
Description
Sensor type 3 Cup Anemometer 3 Cup Anemometer
Applications
  • Wind turbine control
  • Wind speed measurement for programmable controllers
  • Wind resource assessment
  • Meteorological studies
  • Environmental monitoring
  • Wind turbine control
  • Wind speed measurement for programmable controllers
  • Wind resource assessment
  • Meteorological studies
  • Environmental 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 Controllers or loggers requiring a square wave signal Controllers or loggers requiring a square wave signal
Output signal
Signal type
  • Square wave signal from open collector transistor
  • External pull-up resistor required
  • Frequency proportional to wind speed
  • Square wave signal from open collector transistor
  • External pull-up resistor required
  • Frequency proportional to wind speed
Anemometer Transfer Function m/s = (Hz x 0.765) + 0.35
[ miles per hour = ( Hz x 1.711 ) + 0.78 ] 		m/s = (Hz x 0.765) + 0.35
[ miles per hour = ( Hz x 1.711 ) + 0.78 ]
Recommended load resistance
  • output sinks up to 20 mA
  • 3300 Ohm typical pull-up resistor for 24 V
  • 1500 Ohm typical pull-up resistor for 12 V
  • 330 Ohm typical pull-up resistor for 5 V
  • output sinks up to 20 mA
  • 3300 Ohm typical pull-up resistor for 24 V
  • 1500 Ohm typical pull-up resistor for 12 V
  • 330 Ohm typical pull-up resistor for 5 V
Calibration Purchase #2551 for MEASNET calibration. Purchase #2551 for MEASNET calibration.
Output signal range 0 Hz to 125 Hz 0 Hz to 125 Hz
Response characteristics
Threshold 0.78 m/s (1.75 miles per hour) 0.78 m/s (1.75 miles per hour)
Distance constant (63% recovery) 3.0 m (10 feet) 3.0 m (10 feet)
Moment of inertia 68 x 10-6S-ft2 68 x 10-6S-ft2
Swept diameter of rotor 190 mm (7.5 inches) 190 mm (7.5 inches)
Power requirements
Supply voltage 5 V to 26 V DC 5 V to 26 V DC
Supply current 9 mA maximum 9 mA maximum
Installation
Mounting Onto a 13 mm (0.5 inch) diameter mast with cotter pin and set screw 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 0.25 inch nut driver, petroleum jelly, electrical tape
Accessories Protective PVC sensor terminal boot included Protective PVC sensor terminal boot included
Environmental
Operating temperature range -55 °C to 60 °C (-67 °F to 150 °F) -55 °C to 60 °C (-67 °F to 150 °F)
Operating humidity range 0 to 100% RH 0 to 100% RH
Physical
Connections 4-40 brass hex nut / stud terminals 4-40 brass hex nut / stud terminals
Weight 0.14 kg (0.3 pounds) 0.14 kg (0.3 pounds)
Dimensions
  • 3 cups of conical cross-section, 51 mm (2 inches) dia.
  • 81 mm (3.2 inches) overall assembly height
  • 3 cups of conical cross-section, 51 mm (2 inches) dia.
  • 81 mm (3.2 inches) overall assembly height
Materials
Cups One piece injection-molded black polycarbonate One piece injection-molded black polycarbonate
Body Black ABS plastic Black ABS plastic
Shaft Beryllium copper, fully hardened Beryllium copper, fully hardened
Bearing Modified Teflon, self-lubricating Modified Teflon, self-lubricating
Boot Protective PVC sensor terminal boot included Protective PVC sensor terminal boot included
Terminals
  • Brass terminal studs
  • Nickel plated brass nuts
  • Brass terminal studs
  • Nickel plated brass nuts

NRG Systems • 110 Riggs Road • Hinesburg, Vermont 05461 • +1 802-482-2255 • info@nrgsystems.com