Gas sensor with increased measuring sensitivity

Details Gas sensor with increased measuring sensitivity Gas sensor with increased measuring sensitivity

2007-08-21

2007-08-21

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Gas analysis

C073S031050

Reexamination Certificate

active

11058654

ABSTRACT:
A gas sensor (1) with a detector element (2), which is specific to a gas to be measured and sends a measured signal that depends on the measured gas concentration, has increased measuring sensitivity for measurements in the concentration range from less than 1 ppb to a few ppb. The detector element (2) is exposed in a gas admission adapter (4) to a gas to be measured via a diaphragm (3) arranged in front of the detector element (2), wherein the gas admission adapter (4) has at least a first opening (20) for the entry of the gas to be measured as well as at least a second opening (30), which is connected with a pressure modulator, which generates periodic gas pressure vibrations in the gas admission adapter (4) and is designed, for example, as a pump (5).

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Dakin, J.P. et al.,, “Progress in Liber-Remoted Gas correlation Spectrometry”, Optical Engineering, Soc. of Photo-Optical Instrumentation Engineers, Bellingham, US, vol. 31, No. 8, Aug. 1, 1992, pp. 1616-1620, ISSN: 0091-3286m Abstract, figure 2, p. 1616, right column; p. 1617, right column.

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