Process Description
It functions by having two parallel tubes both containing gas and heating coils. The gases are examined by comparing the rate of loss of heat from the heating coils into the gas. The coils are arranged in a bridge circuit so that resistance changes due to unequal cooling can be measured. One channel normally holds a reference gas and the mixture to be tested is passed through the other channel.
| Name | Chemical composition | Mass (g/mole) |
|---|---|---|
| Hydrogen | H2 | 2.0158 |
| Oxygen | O2 | 31.998 |
| Water vapor | H2O | 18.0069 |
| Nitrogen | N2 | 28.014 |
| Carbon dioxide | CO2 | 44.009 |
| Carbon monoxide | CO | 28.010 |
| Methane | CH4 | 16.0426 |
Read more about this topic: Thermal Conductivity Detector
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