Active chemical transducer with optical fibres and reagent supporting means
First Claim
1. Active chemical transducer with optical fibres, for measuring a given characteristic of a fluid medium, said transducer having at least one assembly with a reagent appropriate for said measurement and intended to interact with the fluid medium, support means for supporting the reagent, an optical fibre, calling the emitting fibre and used for transmitting light in the direction of the support means and at least one other optical fibre, called the receiving fibre, which recovers at least part of the light from the support means, when the latter receive the light from the emitting fibre, wherein the support means have a single, membraneless, completely porous and adsorbing element, to which is fixed the reagent and which is positioned facing but spaced from the emitting fibre and each receiving fibre, substantially all of the outer surface of said element being unconfined and in direct contact with the fluid medium when the transducer is immersed in the latter.
1 Assignment
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Accused Products
Abstract
It is intended for measuring a given characteristic of a fluid medium and comprises at least one assembly having an appropriate reagent for said measurement and serving to interact with the fluid medium, reagent support means, an optical fibre (2) called the emitting fibre and used for transmitting light in the direction of the support means and at least one other optical fibre (4), called the receiving fibre and which recovers at least part of the light from the support means when the latter receive the light from the emitting fibre. The support means comprise a single porous or adsorbant element (10) to which is fixed the reagent and which is positioned facing the emitting fibre and each receiving fibre. This element is in direct contact with the fluid medium when the transducer is immersed in it and therefore has no confinement membrane.
58 Citations
21 Claims
- 1. Active chemical transducer with optical fibres, for measuring a given characteristic of a fluid medium, said transducer having at least one assembly with a reagent appropriate for said measurement and intended to interact with the fluid medium, support means for supporting the reagent, an optical fibre, calling the emitting fibre and used for transmitting light in the direction of the support means and at least one other optical fibre, called the receiving fibre, which recovers at least part of the light from the support means, when the latter receive the light from the emitting fibre, wherein the support means have a single, membraneless, completely porous and adsorbing element, to which is fixed the reagent and which is positioned facing but spaced from the emitting fibre and each receiving fibre, substantially all of the outer surface of said element being unconfined and in direct contact with the fluid medium when the transducer is immersed in the latter.
Specification