Define industrial detection sensor and provide several examples of the types of applications for which it is used. List the parts of a limit switch, provide examples of the types of functions it performs, and list precautions that should be followed when connecting it to machinery. Explain the operation of an inductive proximity detector, describe the function of the sensor circuitry, and provide examples of its applications. Explain the operation of a capacitive proximity detector, describe the function of the sensor circuitry, and provide examples of its applications.