AGILENT Technologies 7890A GC System with FID Detector, 7683B Series Injector also with Computer. Indeed the Agilent Technologies 7890A GC System is the most widely used Gas Chromatograph system in the world. Importantly, the Flame Ionization Detector or FID is the most commonly used GC dectection method due to the superior ability to measure hydrocarbons. In addition the Agilent 7683B injector improves the performance and reliability of the GC system. Excellent condition.