This document summarizes several gas chromatography (GC) products from PID Analyzers, LLC including the number of units sold of each model. The GC311, GC301A/Amsco, and GC501/Airco-BOC models are no longer in production, while the PI51/52 PID GC Detector is still being produced. The document then lists various applications and customers for each model, including monitoring volatile organic compounds (VOCs), ethylene oxide, chlorinated hydrocarbons, and other gases in air, soil, water, stacks, and process streams. Configurations included portable GCs and detectors for PID, FID, ECD, and FUV.