Chemical dosing is the introduction of a measured quantity of a chemical into a process fluid so that a chemical reaction occurs in the process fluid or a particular blend of fluids is achieved.

Process control actuators have an important role to play in chemical dosing and blending. Constant, precise control of the volume of fluid injected into the process is dependent on the accuracy and reliability of these actuators. Regardless of the environmental conditions, these electromechanical devices must maintain precise control as required by the process demand.