G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
G01L7/18—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges
G01L7/24—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges involving balances in the form of rings partly filled with liquid
Dispositif de réglage automatique de la circulation d'un fluide dans une canalisation, en fonction de la pression d'un autre fluide, notamment applicable à une installation frigorifique.