The inline Panametrics PanaFlow MV84 vortex flow meter has a multivariable design that consists of a vortex shedding velocity sensor, an RTD temperature sensor, and a solid state pressure transducer that measures the mass flow rate of steam, gases, and liquids.
Other meter types use external process measurements to calculate mass flow. The temperature and pressure devices are typically not installed in the same location as the flow meter. Process conditions can vary greatly between the two locations, causing inaccurate mass flow readings. The MV84 measures velocity, temperature and pressure at the same location, which provides more accurate process measurement.
The MV84 offers flow computer functionality in a compact field device. The VTP option incorporates temperature and pressure sensors to provide an instantaneous reading of compensated mass flow rate of gases, liquids and steam. In addition to outputs for totalized mass and alarm settings, the field configurable electronics deliver up to three analog 4-20mA outputs of five process measurements, including volumetric flow rate, mass flow rate, pressure, temperature and density. Alternate configurations for mass flow include a temperature only compensation (VT), best used when in saturated steam applications, and an integrated RTD with an external pressure transmitter (VT-EP) when a full function pressure transmitter is desired.
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