Patent ID: 8683846

Claim:
A gas chromatograph operable to analyze a sample gas comprising a carrier gas and components, the gas chromatograph comprising: a separation device operable to separate the components of the sample gas; a sample sensor connected to an output of the separation device so as to be in contact with the sample gas, the sample sensor having a resistance that is dependent on the temperature of the sample sensor; a bridge circuit into which the sample sensor is connected, the bridge circuit comprising a plurality of resistors; a servo amplifier connected to the bridge circuit and operable to maintain the sample sensor at a constant temperature, the servo amplifier having an output corresponding to the thermal conductivity of the sample gas; an analog-to-digital converter operable to generate a digitized sample signal from the output of the servo amplifier; a processor connected to the analog-to-digital converter and operable to receive the digitized sample signal; a computer readable medium; and program instructions stored on the computer readable medium and executable by the processor to perform a method of quantifying the components in the sample gas solely from the digitized sample signal.