... 99.99% and 99.999% Industrial grade welding argon Ar gas, 99.99% purity argon gas/industrial gas/welding gasMain ... .9% ,99.999%, 99.999 Working pressure: 150 barArgon (Ar) is a colorless, nonflammable, inert gas. It acts as a ... Furnace Atomic Absorption, Fourier Transform Infrared; Gas Chromatography - High Efficiency Discharge Detector, Ultrasonic detector, carrier gas when analyzing hydrogen in ...