Sensors are the “senses” of modern control systems. They provide critical information about physical conditions—temperature, pressure, motion, position, and more—that control algorithms use to maintain stability, optimize performance, and ensure safety. Selecting the right sensor isn’t just a matter of picking a device off the shelf; it requires balancing performance needs, environmental constraints, cost considerations, and integration capabilities. This article explores the different sensor technologies used in control system design and offers guidance on choosing the sensor that’s right for your application.