Super User Vortex Flow Meters Our Vortex Flow Meters are available in both inline and insertion versions. Sierra Instruments are known as global leaders in manufacturing high quality mass flow meters. InnovaMass 240i Inline iSeries Next Generation Vortex Flow Meters With multivariable capability it is easier to maximise your steam productivity and reduce overall cost of ownership. InnovaMass 240S Inline Vortex Flow Meters Highly reliable with no moving parts. Mass & Volumetric flow monitoring of most gases, liquids and steam. Pro-V Model M22 Inline Vortex Flow Meters Monitoring for most liquids, gases, and steam while delivering direct readings of volumetric flow rate. Pro-V Model M23 Insertion Vortex Flow Meters Volumetric or Mass flow monitoring for most liquids, gases, and steam. Highly reliable with no moving parts.