A flow transmitter converts the physical parameters of the flow of liquids or gases into a standardized electrical signal, such as voltage, current or frequency. This device converts the physical movement of fluids into measured values that can be analyzed and controlled. The resulting measurements are converted into electrical signals that can be used for process monitoring and control. Typically, a flow transmitter provides an output signal proportional to the flow rate. Flow transmitters use three basic types of meters: mass, volume, and velocity.