ultrasonic level sensor wikipedia

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ultrasonic level sensor wikipedia

Kerry D. Wong » Blog Archive » A Sensitive DIY Ultrasonic ...

I needed some ultrasonic range finders for my project. But most of the commercial sensors like Parallax's PING sensor and other similar products are quite expensive, especially if multiple units are needed.

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Ultrasound - Wikipedia

Ultrasound is defined by the American National Standards Institute as "sound at frequencies greater than 20 kHz." In air at atmospheric pressure ultrasonic waves have wavelengths of 1.9 cm or less.

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Ultrasonic transducer - Wikipedia

Applications and performance. Ultrasound can be used for measuring wind speed and direction (), tank or channel fluid level, and speed through air or water.For measuring speed or direction, a device uses multiple detectors and calculates the speed from the relative distances to particulates in the air or water.

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