Comparison of level measurement and detection methods

Nothing seems more trivial than level measurement! Alongside temperature, pressure and flow measurements, it's one of the four fundamental measurements assumed by industrial instrumentation. However, the multiplication of methods employed demonstrates that level is, in reality, a more complicated parameter to master at first glance. Its complexity stems from the diversity of conditions of use, the physico-chemical properties of the products to be measured, and safety and, where applicable, legislative constraints (legal metrology for commercial transactions). Level measurement is used in automation management (process engineering), monitoring (water management, alarm triggering) and analysis of physico-chemical data during measurement campaigns. These tables are intended as guides to help the user select the most appropriate method(s) for each particular case.

Please refer to the corresponding article for details of the chosen method:

• [R 2 010] "Level measurement and control – Introduction;

• [R 2 011] "Level measurement and control – Systems for liquids and solids;

• [R 2 012] "Level measurement and control – Liquid-specific systems;

• [R 2 013] "Level measurement and control – Systems for solids".