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Methods and apparatus for making chemical concentration measurements in a sub-surface exploration probe

  • US 5,351,532 A
  • Filed: 10/08/1992
  • Issued: 10/04/1994
  • Est. Priority Date: 10/08/1992
  • Status: Expired due to Fees
First Claim
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1. A sub-surface exploration probe for making repeated concentration measurements of a chemical occurring in a sub-surface fluid, the probe comprising:

  • a probe housing having a surface which is exposed to the sub-surface fluid;

    a chemical detection chamber for containing a solvent in which the chemical is soluble;

    a filter having a first side positioned to contact the sub-surface fluid, the filter having a second side positioned to contact solvent within the housing, the filter allowing the chemical to permeate from the sub-surface fluid into solvent within the housing;

    a radiant energy source positioned relative to the chemical detection chamber to direct radiant energy into the chemical detection chamber; and

    a sensor apparatus positioned relative to the chemical detection chamber to measure radiant energy within the chemical detection chamber and thereby determine solvent chemical concentration.

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