What are 4 instruments used to measure direction (wind, land, wave, direction of anything else)? - Quora
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Amazon.com: Anemometer Wind Meter, Wind Direction Sensor Transmitter, 360 Degree Wind Transmitter Transducer Wind Speed Anemometer Instruments for Ambient Weather(0-10V 0.7m Patch Cord) : Patio, Lawn & Garden
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Wind Direction Sensor,High Accuracy Transmitter Anemometer Direction Speed Sensor Measuring Instrument 10~30V DC for Wind Direction Measurement : Amazon.ca: Industrial & Scientific
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