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Sensor module with enhanced capillary flow

  • US 10,034,629 B2
  • Filed: 01/05/2012
  • Issued: 07/31/2018
  • Est. Priority Date: 01/06/2011
  • Status: Active Grant
First Claim
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1. A sensor module comprising:

  • a main housing defining an analysis zone within the housing, the main housing having a sampling end;

    a skin piercing member mounted within the main housing, the skin piercing member being movable relative to the main housing along a slide axis between a retracted position and an extended position;

    first and second electrodes positioned at the analysis zone and extending in a direction perpendicular to the slide axis; and

    a fluid sample flow passage that extends from the sampling end of the main housing to the analysis zone, the fluid sample flow passage including a funnel structure at the sampling end through which the skin piercing member extends when in the extended position and a passage extending from the funnel structure into the analysis zone, the funnel structure having a first width at the sampling end and a second width at an opposite end, the second width being smaller than the first width, the fluid sample flow passage also including capillary flow enhancing slots extending in a direction perpendicular to the first and second electrodes from the funnel structure first width at the sampling end to the funnel structure second width at the opposite end and the capillary flow enhancing slots extending laterally from opposite sides of the funnel structure first width to define a width of the sampling end, wherein the width of the sampling end is greater than the first width of the funnel structure.

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