This passage provides a protected route for electrical wiring, sensor cables, or fluid lines to enter a machine housing or pressure vessel. It often incorporates specific sealing mechanisms like potting, glands, or O-rings to maintain internal pressure or prevent contamination. Designing a proper entry point prevents chafing and environmental ingress at the transition boundary.
Heard on the job
Check the potting compound on the sensor inlead because we're getting moisture inside the main control housing.