Multivariable transmitters are a DP transmitter with the ability of not only measuring differential pressure, static pressure, and temperature but other values as well. These values are known as independent process variables, which are used to compensate when there are changes in the media’s density, viscosity, as well as other flow parameters when used as a mass flow meter. When used as a differential flow transmitter, it measures pressure, temperature, and DP pressure all at the same time.