Which type of sensor is NOT one of the five electronic sensors mentioned?

The answer provided is insightful as the infrared sensor is indeed not categorized among the five specific electronic sensors typically highlighted in discussions about essential sensor types used in industrial applications.

Focusing on the sensors that are usually mentioned in such contexts, a magnetic reed switch, inductive sensor, and capacitive sensor are fundamental components often utilized in automation and control systems. The magnetic reed switch operates similarly by using a magnetic field to open or close a circuit, making it essential in scenarios requiring the detection of position or movement. Inductive sensors are crucial for detecting metallic objects without physical contact, making them valuable in various industrial settings. Capacitive sensors are widely applied for detecting non-metallic objects and can also sense changes in capacitance due to proximity.

In contrast, while infrared sensors are definitely used in various applications—often for detecting temperature changes or proximity—they do not fall into the typical category of sensors emphasized when discussing this foundational aspect of Industry 4.0 technologies. Therefore, distinguishing these sensors based on their specific applications and functions helps in understanding the varied landscape of sensor technologies within industrial contexts.