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Quizzed article | REF: R2011 V2

Level Measurement and verification – systems for liquids and solids

Author: Florestan OGHEARD

Publication date: June 10, 2020, Review date: April 26, 2021 | Lire en français

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    6. Sound wave and ultrasonic measurement systems

    This method of measuring true levels without contact with the product, based on the reflection of a sound or ultrasound wave on the product/gas interface, was long considered promising, but difficult. A better understanding of the phenomena involved and the advent of more sophisticated electronics (notably microprocessor-based) have enabled us to master the problems and produce perfectly reliable installations.

    6.1 Characteristics of sound and ultrasound waves

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    6.1.1 Propagation speed

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