The GSM-4 Gas Mixer creates custom gas blends from any four input gasses. A mixture is defined by a Total Flow, and the percent concentration of each gas. The resulting flow for each gas is computed and displayed on the LCD display. Four user-defined mixtures can be stored locally on the GSM-4.

The GSM-3 Programable Gas Mixer creates custom gas blends from any three input gasses. A mixture is defined by a Total Flow, and the percent concentration of each gas. The resulting flow for each gas is computed and displayed on the LCD display. Four user-defined mixtures can be stored locally on the GSM-3.