Sierra was the first to introduce a multivariable mass vortex flow meter to the market in the late 1990’s. Sierra’s multivariable product line features an in-line version, the InnovaMass® 240 and a unique insertion version, the InnovaMass® 241. The 241 has emerged recently as the proven instrument of choice in geothermal steam applications across the globe. Both the 240 and 241 measure the mass flow rate of any gas or liquid and are ideally suited for saturated or superheated steam. The InnovaMass offers customers one instrument and one process connection, measuring five process parameters simultaneously: mass flow rate, temperature, pressure, volumetric flow rate, and fluid density.