Designed primarily for use with Sigma make Automated GC Model 606. It can be connected to any make GC with proper attachment. The features includes 6 vials of 20ml capacity, temperature controller having range from ambient to 200 Deg C with accuracy of + 0.1 Deg C to heat vial block, gas sampling valve, sample loop & samples transfer line. Sequences of Head space sampler like pressurizing, depressurizing samples injection & flushing are done through time event relay provided in GC.