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2. Liquid level definition
Locating plane: locating a level implies the presence of a reference plane, chosen in a purely conventional way. This could be, for example, the base of a tank, the zero level of a factory floor, or the so-called "normal" level of a balloon, from which fluctuations in the actual level of the liquid will be assessed.
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Liquid in static equilibrium: a liquid level can only be defined if it is in perfect static equilibrium, with a smooth, mirror-like surface.
In practice, the accuracy of level measurement must take account of fluctuations around a statistical mean value, with a standard deviation and a distribution law associated with local and global variations in the liquid "plane". Usually, only the measurement of this mean level is industrially meaningful. High-frequency disturbances (ripples) can be eliminated...
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Liquid level definition
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Bibliography
Websites
Online course on level measurement using radar technology :
https://academy-online.krohne.com/elearning/fr/cours/mesure-de-niveau-radar/
Engineer's Garage: level sensors :
...Standards and norms
- Radiation protection – Sealed radioactive sources – General requirements and classification - ISO 2919 - 2012
- Tanks for transporting hazardous materials – Tank service equipment – Fill limiters for liquid petroleum fuels - NF EN 13922 - 2011
The catalog of Iso and Afnor standards can be consulted online on the Afnor website: http://www.afnor.fr
...Regulations
Arrêté du 8 juillet 2003 relatif au contrôle métrologique des récipients-mesures. NOR: INDI0301736A
Decree no. 2002-460 of April 4, 2002 on the general protection of individuals against the dangers of ionizing radiation.
Decree no. 98-1186 of December 24, 1998 amending decree no. 86-1103 of October 2, 1986, as amended, on the protection of workers against the dangers of ionizing...
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Manufacturers – Suppliers – Distributors (non-exhaustive list)
Table 1 lists the main manufacturers, classified by measuring system.
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