The MINICAMS® Series 4000 is an automatic, near-real-time continuous air monitoring system using gas chromatography and sample collection with a solid-sorbent preconcentrator or fixed-volume sample loop. The MINICAMS automatically collects an air sample, performs an analysis, and reports the result. Reported agent concentrations above a user-set threshold generate an ALARM status that can be reported via various pathways. Two different Plug-In GC Modules allow configurations to maximize selectivity and sensitivity for monitoring all chemical warfare (CW) agents. Multiple MINICAMS can be networked to provide a facility-wide Air Monitoring System. The MINICAMS Series 4000 is a flexible, expandable system developed specifically for detecting all CW agents, simulants, and related compounds at extremely low levels.