METHOD AND APPARATUS FOR REMOTE MEASUREMENT OF PHYSICAL PROPERTIES INSIDE A SEALED CONTAINER

摘要

A method and an apparatus for measuring the pressure or other physical quantities of a gas or a liquid in a sealed container (34) without penetrating the container (34). Two permanent magnets (62, 70), one (62) located on a sensing unit (44) inside the container (34) and one (70) located on a readout unit (80, 82) located outside the container (34) are used to communicate the magnitude of the pressure sensed inside the container (34) to the readout unit (80, 82). No power supply is required to implement this system.