Sierra Instruments” Innova-Mass multivariable mass vortex flowmeter is designed for cryogenic fluid measurement applications. The meter has undergone extensive testing and field validation over the last several years, and it has proven its capability in providing mass flowrates of cryogenic fluids down to -328 F (-200 C). Using a special cryogenic temperature RTD, mass calculations are performed with the latest density equations of state for liquid Oxygen, Nitrogen, Argon, and CO2. The meter is capable of measuring five process variables (mass flow, volumetric flow, temperature, pressure and density) through one process connection. Since everything is calibrated together, system accuracy is very high. Because mass flow is directly measured, the Reynolds number can be dynamically calculated and the flow profile effects in large pipes calculated in real time. This allows the meter to make reliable measurements in large pipes (up to 72 inches) where using an in-line meter would be cost prohibitive. The meter is loop-powered, with power in, a programmable analog output, and a HART or MODBUS signal riding on the same two wires.