Introduction:
This anemometer is an improved version of the popular three-cup design used in wind assessments for decades. It is manufactured to precise industry standards. The rotor is made of tough polycarbonate for exceptional durability and reliability. The sensor base is also made of rugged polycarbonate, making it more resistant to damage during installation than our competition. A green molded vinyl boot protects the anemometer wiring. Made in the USA with exceptional quality control -- all units are tested mechanically and electronically before shipping.
Internally, the #40R anemometer has a fully hardened beryllium-copper shaft running in self-lubricating modified Teflon bearings. The rated bearing PV (pressure-velocity) factor is 20,000. At 15 MPH the PV is approximately 500. At 100 MPH the PV is approximately 2,000. Over designed, is an understatement.
Specifications:
| Performance | |
|---|---|
| Accuracy: | Within 0.1 m/s (0.2 MPH) for the range 5 m/s to 25 m/s (11 MPH to 55 MPH) |
| Rotor Moment of Inertia: | 92.2 x 10-6 kg-m2 (68 x 10-6S-ft2) |
| Distance Constant: | 3.0 m (10 feet) |
| Calibration: |
Not individually calibrated. Calibration statistically based on samples. |
| Output Signal | |
| Sensor Type: | Reed switch, dry contact. Frequency proportional to cup rotational speed. |
| Transfer Function: |
m/s = (Hz * 0.383) + 0.324 MPH = (Hz * 0.857) + 0.725 |
| Protection: | Metal Oxide Varistor (MOV) between terminals |
| Physical Properties | |
| Cup Diameter: | 51 mm (2 inches) |
| Rotor Diameter: | 190 mm (7.5 inches) |
| Weight: | 108 grams (3.8 ounces) |
| Mounting and Wiring | |
| Mounts On: | 12.7 mm (0.5 inches) round rod or tubing |
| Mounts Using: | Set screw and cotter pin |
| Wiring Terminals: | Two #4-40 brass screws with captive nuts |
Pricing:
Now you can purchase these products directly through our sister website:
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#40R anemometer
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US Price: $150.00 USD Please call us at +1-507-454-2727 to place an order. Or click here to order online from #40R anemometer with dry contact reed switch and rubber boot.
Part Number: APRS6504 Shipping Weight: 0.50 pounds RoHS: compliant Origin: USA 
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Accessories:
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#40R anemometer cable, 30.5 m (100 ft)
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US Price: $35.00 USD Please call us at +1-507-454-2727 to place an order. Or click here to order online from Arctic Ultraflex Blue™, UV resistant, two Conductor / 20 AWG, power limited tray cable, 300 volt. This is our finest sensor cable and is exclusive to Off Grid Options / APRS World, LLC! It consists of two 20 AWG conductors protected by an ultra tough and highly flexible Arctic Ultraflex jacket. The cable remains flexible to -55°C (-67°F). Conductors are white and black. This is ideal cable for our #40R Anemometer. Custom sizes available. Part Number: APRSC1000 Shipping Weight: 2.50 pounds RoHS: compliant Origin: USA
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Anemometer / wind vane replacement boot, green, molded vinyl
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US Price: $5.00 USD Please call us at +1-507-454-2727 to place an order. Or click here to order online from Replacement molded vinyl boot for our #40R anemometer and wind vane. Not compatible with APRS6500 series anemometer. Part Number: APRS6512 Shipping Weight: 0.13 pounds RoHS: compliant Origin: USA
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Anemometer and wind vane splitter board
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US Price: $15.00 USD Please call us at +1-507-454-2727 to place an order. Or click here to order online from The splitter board allows up to three anemometers and one wind vane to be connected to the Wind Data Logger using normal CAT5 cables. It is compatible with our DIN rail mounting feet. Board dimensions are 72 mm x 44 mm (2.85 in x 1.75 in). This is needed when just the Wind Data Logger Module or one of the Starter or Basic Packages is used. It is not required when using any of the Outdoor Self-Contained Packages (AC, Solar or Polar edition). Part Number: APRS6510 Shipping Weight: 0.13 pounds RoHS: compliant Origin: USA
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Mounting Options:
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Z-Boom, 330 mm (13 in) Offset
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US Price: $23.00 USD Please call us at +1-507-454-2727 to place an order. Or click here to order online from Z-boom for offset mounting of sensors. Standard size - 330 mm (13 in) offset. Custom sizes available upon request. Note: This version does not come with the small holes pre-drilled. Part Number: APRS6608 Shipping Weight: 0.50 pounds RoHS: compliant Origin: USA
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Stub Mast, 279 mm (11 in)
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US Price: $9.00 USD Please call us at +1-507-454-2727 to place an order. Stub mast for mounting #40R anemometer or wind vane. Standard in Wind Data Logger packages that include the #40R Anemometer. Note: This version does not come with the small holes pre-drilled. Part Number: APRS6611 Shipping Weight: 0.20 pounds RoHS: compliant Origin: USA
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Anemometer to 1/2" NPT female adapter, stainless steel
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US Price: $35.00 USD Please call us at +1-507-454-2727 to place an order. Or click here to order online from Anemometer to 1/2" NPT female adapter, stainless steel. Part Number: APRS6607 Shipping Weight: 0.50 pounds RoHS: compliant Origin: USA
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Anemometer to 1/2" NPT female adapter, aluminum
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US Price: $25.00 USD Please call us at +1-507-454-2727 to place an order. Or click here to order online from Anemometer to 1/2" NPT female adapter, aluminum, 6061-T6. Part Number: APRS6609 Shipping Weight: 0.50 pounds RoHS: compliant Origin: USA
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Calibrated Anemometer:
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Anemometer, #40HC, Calibrated
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US Price: $582.59 USD Please call us at +1-507-454-2727 to place an order. Calibrated #40 hall effect anemometer. Includes calibration certificate. Part Number: APRS6506 Shipping Weight: 1.00 pounds RoHS: compliant Origin: USA
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