Arklay S. Richards Compact High Speed Wind Sensors

Off Grid Options and APRS World are proud to add Arklay S. Richards Compact High Speed Wind Sensors to our product line. Options include both reed switch pulse output and AC frequency output anemometers along with heated sensors and anti-stick coated anemometer rotors. Specifications for each sensor are available when you click the appropriate links. Please note that only the switch pulse output anemometers are compatible with APRS World's Wind Data Logger. These are special order items that may require a two week lead time prior to shipping.

Standard Compact Anemometer:

• All Stainless Steel Construction
• Strong and Light Weight Titanium Rotor Hub
• Anti-ice Coated Shaft Tower
• Hardened Stainless Steel Shaft
• .50" O.D. Tubing Mount
• Field Replaceable Stainless Steel Bearings
• Field Replaceable Reed Switch
• Internal Over Voltage Protection
• Anti-Ice Coated Rotor Cups

Technical Specifications:

Anemometer Output

• Pulse Output from Reed Switch Contact Closure: 4 pulses per revolution

Anemometer Performance and Transfer Functions

• Maximum Speed: 230+ mph or 102.82 + m/s
• Reed Switch Pulse/Sec Output Signal Range: 0 to 322
• Distance Constant @ 63% Recovery: 33.20 ft or 10.12 m
• Measuring Range: 0 mph to 230 mph, 0 m/s to 102.82 m/s
• Characteristic Transfer Function: V [m/s] = .3191 x f [Hz] +.71
• Characteristic Transfer Function: V [mph] = .7138 x f [Hz] +1.59
• Starting Threshold All Positions Averaged: 2.70 mph or 1.21 m/s
• Starting Threshold @ Optimum Flow Position: 1.54 mph or 0.69 m/s
• Accuracy Test Range: 8.97 mph to 100.60 mph or 4.01 m/s to 44.97 m/s
• Accuracy within Range with Characteristic Transfer Function: .2 mph or .1 m/s

Electrical Technical Data

• Reed Switch: Voltage 200 Vdc max, current 1.0 A max
• Magnet: 4-Pole

Materials of Construction

• Shaft Tower: 316 stainless steel
• Shaft: Hardened 303 stainless steel
• Anemometer Housing: 316 stainless steel
• Cups, Arms, and Rotor Assembly: 316 stainless steel, Titanium
• Bearings: C-BRN0203OF double shielded, hardened stainless steel balls

Physical Dimensions

• Height: 4.25 inches or 107.95 mm
• Weight: .942 pounds or 427.28 grams
• Body Diameter: 1.50 inches or 38.10 mm
• Swept Diameter of Rotor: 5.5 inches or 139.70 mm
• Rotor Cup Conical Cross-Section: 2.196 inches or 55.77 mm

Electrical Connections and Cables

• Cable End: 108” cable split with bare leads
• Cable: 2 conductors, 20 gauge, shielded with drain, PVC jacket

Tools Required for Mounting, Installation, and Maintenance

• Tools: 1/8, 5/32, inch Allen Wrench, Phillips Screwdriver and .25” torque pin
• Mounting: 0.5 inch or 12.7 mm diameter mast with three set screws

Environmental Specifications

• Operating Humidity Range: 0 to 100% RH
• Bearing Operating Temperature: -65°F to 300°F or -54°C to 148°C
• Reed Switch Operating Temperature: -40°F to 257°F or -40°C to 125°C

Anemometer Protection

• Finish: Modified green anti-ice coating on shaft tower
  
• Climatic Protection: Protection against water, high humidity, salt spray, and dust
• Electrical Protection: Over voltage and surge protection incorporated in electrical components

Calibration Test Standards

• ASTM D 5096-02: Standard Test Method for Determining the Performance of a Cup or Propeller Anemometer
• ISO 17713-1: Meteorology Wind Measurements Part 1: Wind Tunnel Test Methods for Rotation Anemometer Performance