Several different detector designs exist for process gas chromatographs. The two most common are the flame ionization detector (FID) and
Flame Ionization Detector Chemistry labs, Chemistry, Science
A rapid multidimensional GC–flame-ionization detector method for
FLAME IONIZATION DETECTOR
Flame Ionization Detector - an overview
Electron capture detector - Wikipedia
Detectors in Gas Chromatography
Flame Ionization Detector (FID) Principle - Inst Tools
Flame Ionization Detector Principle
Broadband Laser-Based Infrared Detector for Gas Chromatography