High efficiency oxygen trap has a capacity of 2.5 liters at room temperature. It is also effective for removing sulphur compounds such as hydrogen sulfide and mercaptans. This oxygen trap is for use with nonoxidizing gases such as; He, Ar, N2, and CH4. Oxygen removal to below 70 ppb using normal GC flow rates. The catalyst is a copper-based material that forms copper oxide in the presence of oxygen; no gas is produced from this reaction. This trap is intended for use with gases containing less than 1% oxygen. The trap is delivered active purged with nitrogen. (Purging with the gas you will be using is recommended.) Maximum pressure 1000 psig. Approximate dimensions: 2 in. x 14 in. including fitting end; fittings are 1/8 in.