2. Operational Technology (OT)
A sensor is a device that produces an output signal for the purpose of sensing a physical phenomenon.
Sensors are devices, which are meant to sense physical parameters around them, like the length until the next solid object in front of them by a light barrier, or temperature by thermometer or pressure by a barometer. As already described in the chapter summary, sensors are a very important part of a control loop and are present in basically all machine processes.
We recommend you are watching this video to get to know about different types of sensors.
Sensors, as are actuators, are usually linked to other devices by IO-Link, which is a point-to-point protocol used to connect them and let them communicate.