The 601 Series is an easy-to-use laser gas delivery system regulator designed to eliminate atmospheric contamination during resonator gas cylinder exchange. Regulator incorporates M2 technology to minimize atmospheric contamination caused by deposited contaminates that reduce laser power output and distort beam-mode quality. Stable emission and higher resonator efficiencies are achievable because of the low internal volume construction and smooth flow paths that eliminate dead space as potential entrapment sites for moisture or hydrocarbons. Regulator offers an options integral purge assembly and an internal check vales that guarantees gas purity and lower maintenance costs. CONCOA 1501 Harpers Rd. Virginia Beach, VA, 23454