Patent ID: 11920998
Assignee: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. Pressure sensing unit able to measure a fluid pressure, characterized in that it comprises two layers made of a liquid-tight material and a membrane,
wherein one at least of said two layers is made of a material that is also light transparent,
wherein said membrane is impermeable to the fluid to be characterized and is able to deform under the pressure exerted by the fluid,
characterized in that said layers and said membrane are arranged according to the following configuration:
one layer is a top layer comprising an upper cavity,
another layer is a bottom layer comprising one lower cavity formed at its surface and facing the upper cavity of said top layer, said lower cavity containing a slab of a photonic hydrogel immersed in an aqueous buffer solution,

said membrane separates the top layer from the bottom layer.