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Amazon.com: Wintact Digital Anemometer CFM/CMM, Weather Station Wind Speed Meter Gauge Measuring Air Velocity, Wind Volume, Wind Direction, Ambient Temperature, Humidity with Data Logger for HVAC Duct, Outdoor : Patio, Lawn &
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Amazon.com: Professional Anemometer Datalogger Wind Speed Velocity Meter Air Flow CFM CMM Air Volume Wind Direction Temperature Humidity Measurement Digital Tester Gauge with MAX / MIN / AVG Value, Data Hold :
What are 4 instruments used to measure direction (wind, land, wave, direction of anything else)? - Quora
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