ABSTRACT
This part introduction presents an overview of the key concepts discussed in the next chapter. The part presents a brief review of the variables that must be measured in the powder handling processes. There may be many variables that represent process situations, including the flow rate of powders, and the temperature and pressure of powder handling equipment. Instrumentation is one of the most important subjects in powder handling processes. Several instruments are required for the measurement of these process variables. The important state variables in a powder handling process are Powder Flow Rate, Particle Concentration in Suspensions, Level of Powder in a Storage Vessel, Particle Size, Moisture Content, Pressure or Load, Temperature, Viscosity of Slurry, Composition or Component, Gas Flow Rate. To control a powder handling process, state variables must be transformed into the corresponding electric or pneumatic signals, based on the suitable physical phenomena.
