The ZPure Glass PolyGas I Purifier removes O2, H2O, CO2, CO, halogenated compounds, siloxanes, hydrocarbons heavier than butane, sulfur-containing molecules, and ammonia from inert gases, He, Ar, N2 and H2. It can be used to provide end-point detection for use with other ZPure Filters. It contains highly sensitive visual indicators for oxygen and water contamination. The indicators signal oxygen breakthrough when the adsorbent changes from green to grey and the moisture indicator changes from blue to brown. The ZPure Glass Filters and Purifiers are available with standard compression fittings or quick connect fittings in 1/4” and 1/8” brass and stainless steel.