The RM gas flow multiplexers are multi-channel gas switchers. The three standard configurations are the RM-8 (eight pairs of selectable solenoid valves), RM-4 (four pairs of selectable solenoid valves), and the RM-8S (eight single solenoid valves).  The RM flow multiplexers are a vital component for automated screening systems and allow users to leverage a common set of analyzers for multiple gas streams.