What are the Features of PID Analyzers and how they help in Gas Chromatography? The full form of PID is a photoionization detector and this generally helps in the identification of various compounds. In any compound, there will be some other unimportant or unwanted compounds. For that, these PID Analyzers are to be used. Every compound industry should have these basic tools as they help in enhancing the purification processes of the compounds and there are better solutions too. Hence, what matters the most is, you always have quality products in your hands.