Gas mixer

From GAWDAwiki

Gas Mixers automatically blend a number of individual gases to produce precise gas mixes. While most mixes consist of 2 to 3 gases, some gas mixers are capable of mixing up to 8 component gases. Gas mixers are often utilized in place of premixed gases to reduce costs as well as directly controlling the exact specifications of the mixture. Although the number of uses is unlimited, common applications are for blending of shielding gases and SCUBA gases.