FEP Expansion Equipment watches every tube as it moves through the line. Sensors and smart controls spot trouble before a bad piece leaves the machine. Early detection stops waste and keeps the whole run on track. Expansion equipment heats and stretches the tubing to the right diameter. Tiny sensors sit near the heating zone and the expansion head. They measure the outside width of the tube many times each second. If the tube grows too wide or stays too narrow, the system sends a signal. Lights flash, or a screen shows the error. Operators can stop the line or adjust the heat right away.