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Microsensor and use of such microsensor

  • US 6,030,828 A
  • Filed: 05/01/1998
  • Issued: 02/29/2000
  • Est. Priority Date: 11/22/1995
  • Status: Expired due to Fees
First Claim
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1. A microsensor for measuring the concentration of a substance in an environment such as a liquid, a gas or a matrix, which microsensor comprises:

  • a reaction space containing biologically active or catalytic material for consuming or transforming the substance during concurrent consumption or concurrent transformation of a co-factor,a diffusion permeable outer barrier for delimitation of the reaction space, anda detector for the co-factor placed at a distance from the outer barrier;

    the reaction space comprising a diffusionally tight first casing with an entrance opening, in which the outer barrier is placed, the microsensor further comprising a diffusion impermeable second casing, which abuts the reaction space, the co-factor being present in a supply space in the second casing, the second casing having a connection opening between the supply space and the reaction space, the connection opening being arranged at a distance from the entrance opening, a diffusion permeable middle barrier being located in the connection opening, and the detector being located in the reaction space or in the middle barrier.

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