초록 ▼

The invention relates to apparatus for detecting a constituent gas in a gas flow. Means is provided for removing the constituent gas from a sample flow and directing this sample flow together with a reference flow containing the constituent gas through an equilibrator means wherein contaminants can

The invention relates to apparatus for detecting a constituent gas in a gas flow. Means is provided for removing the constituent gas from a sample flow and directing this sample flow together with a reference flow containing the constituent gas through an equilibrator means wherein contaminants can be removed before the sample gas and the reference gas are compared in detector means, for example, an electron capture detector. The apparatus and method are also applicable to the detection of a liquid in a flow thereof.

대표청구항 ▼

Apparatus for use in detecting a constituent fluid in very low concentrations in a sample flow of fluid, also containing at least one contaminant, the apparatus comprising first and second conduit means each having an inlet and an outlet and being formed of a material which is permeable to the at le

Apparatus for use in detecting a constituent fluid in very low concentrations in a sample flow of fluid, also containing at least one contaminant, the apparatus comprising first and second conduit means each having an inlet and an outlet and being formed of a material which is permeable to the at least one contaminant; enclosure means for enclosing the first and second conduit means substantially along the length thereof, the enclosure means having an inlet and an outlet whereby a diluent fluid can be passed through the enclosure means to remove contaminant diffused from the first and second conduit means into the enclosure means and whereby residual contaminant can be distributed equally between the first and second conduit means; detector means having a first inlet and an outlet; and valve control means for alternately allowing the sample flow of fluid from the first conduit means to pass through the detector means, when the valve control means is in a first condition, and a reference flow of fluid from the second conduit means to pass through the detector means, when the valve control means is in a second condition.