By means of the innovative mounting concept Flow-SMS, a variety of components for mass flow and pressure measurement and control can be assembled to constitute a very compact gas delivery system. On a lightweight, but still-rugged mounting rail system, one or more mass flow (or pressure) sensor/control modules can be combined with mixing chambers, (pneumatic, electrical or manual) shut-off valves, filters or any other functional module as needed. Flow ranges can be selected between approximately 5 mL/min up to 50 L/min or even higher. In case a pressure sensor or controller is included, the pressure range can be chosen between 0–100 mbar and 0–10 bars absolute or gage. — Bronkhorst High-Tech B.V., Ruurlo, the Netherlands