ABSTRACT
The previous chapters have introduced sound, light, and ionizing radiation as physical phenomena that interact with their environment; these interactions provide the physical observables needed to detect changes in the process or product. Electrical phenomena also respond to changes in the surrounding environment and provide additional mechanisms that can be used in process sensors. Electrical measurements are in fact crucial to process sensors because ultimately all sensors rely on electricity and electronic readouts. For this reason, key concepts in electrical measurement and electronic circuits are reviewed in this chapter.
