Easy-to-use BlendMaster™ enables users to create on site, on demand precision custom-blended ratios for gases in industrial applications. Designed to deliver various blend accuracies, this instrument features EquiBlend™ technology to facilitate production of mixture concentrations of two component gases, such as argon, carbon dioxide, helium, and oxygen used in welding processes. BlendMaster prevents running out of gas. Since pure gases are utilized, unit enhances safety by precluding need to remix gas mixtures that have stratified in storage cylinders. Economical BlendMite™ module for welding utilizes five preset rations of commonly used mixtures and 100% of either of gases and delivers flow rates up to 300 SCFH at 30 PSIG.