PCF - Model 529 NMH, THC - Non Methane Hydrocarbon Automatic Analyzer - Brochure

The FID detector is a carbon atom counter. A sample is introduced into a micro flame lit by hydrogen and air (1:10 ratio), where the electrical charges generated by I he oxidation of Cx to CO are proportional carbon content in the sample. The actual concentration is computed from a calibration employing a traceable refer-ence gas mixture. The electrical charges are collected by two polarised electrodes and converted by an electrical circuit into an electronic signal.