3. Tranquilization systems
Baffles, perforated plates or partitions can be used to provide hydraulic resistance and limit the movement of liquids; this is an indispensable solution, for example, in on-board tanks subject to rolling and pitching.
The stilling tube surrounds a sensor. Its purpose is as much to shield the sensor from rapid surface undulations as to protect it from violent side currents.
A common solution is a stilling column mounted in parallel on a tank via two connections. These connections have the advantage of inducing damping created by their hydraulic resistance (or pressure drop) in series, but also of enabling isolation of the column, also known as a "tank" or "cylinder" depending on usage. This solution, which is generally satisfactory, nevertheless presents a danger: if the hydraulic resistance of a connection (notably the lower one) becomes...
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Tranquilization systems
Bulk solids level
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...
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
Table 1 lists the main manufacturers, classified by measuring system.
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