Importance

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Abstract

To enable a fluid state of a fluid substance flowing through a path in a piping, for example a liquid state or a froth state of beer, to be surely and easily judged while keeping a sanitary condition, allowing a take out to be surely and easily performed, a piping fluid decision device is constituted with an electrostatic capacity sensor (15) disposed outside of a piping (1) adapted for a fluid substance to flow through a path therein, for detecting a variation of electrostatic capacity of the path in the piping (1), reference value storage means for storing in advance a reference variation of electrostatic capacity of the path to provide for a decision on a fluid state of the fluid substance flowing through the path in the piping, and fluid decision means for comparing the detected variation of electrostatic capacity and the stored variation of electrostatic capacity to make the decision on the fluid state of the fluid substance flowing through the path.

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