Active chemical transducer with optical fibres and reagent suppo

Details Active chemical transducer with optical fibres and reagent suppo Active chemical transducer with optical fibres and reagent suppo

1988-03-18

1990-03-06

McGraw, Vincent P.

Optics: measuring and testing

By shade or color

Fluid color transmission examination

25022728, 422 56, 422 58, G01N 2178, G01N 2180, G01N 3352

Patent

active

049070371

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.

REFERENCES:
patent: 4223226 (1980-09-01), Quick et al.
patent: 4295470 (1981-10-01), Shaw et al.
patent: 4517456 (1985-05-01), Halsall et al.
patent: 4557900 (1985-12-01), Heitzmann
patent: 4560248 (1985-12-01), Cramp et al.
patent: 4577109 (1986-03-01), Hirschfeld
patent: 4682895 (1987-07-01), Costello
patent: 4760250 (1988-07-01), Loeppert
Article by W. R. Seitz published in Analytical Chemistry, vol. 56, No. 1, Jan. 1984, pp. 16A-34A.
Article by T. Hirschfeld published in "Advance in Instrumentation", vol. 40, 1st part, 1985, pp. 305-317.

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