Patent ID: 7658094

Claim:
A probe for analyzing fluid concentrations in a fluid to be analyzed, the probe comprising: a probe body including a fitting end and a stem, the stem including an outboard end opposite the fitting end, a first side and a second side; a channel formed along the stem on its first side and second side, the channel extending along the first side from an inlet adjacent the fitting end toward the stem outboard end and passing to the second side to extend from the outboard end to an outlet adjacent the fitting end and the channel being formed on the stem surface at along a portion of its length; and a sheet-form membrane secured to the stem in a sealing configuration over the channel such that a collector fluid can pass through the channel from the inlet to the outlet, the membrane including an active surface exposed to the exterior of the probe and the collector fluid passing through the channel, wherein the channel includes a first open side, a second open side and a portion passing through the body to connect them and the sheet-form membrane is formed of a first membrane secured to the stem over the first open side and a second membrane secured to the stem over the second open side.