Ask any plant engineer what makes them trust their system, and they’ll tell you, visibility. You can have every sensor, every gauge, and still, there’s comfort in being able to see what’s happening inside the unit. That’s where the heat exchanger sight glass earns its quiet importance.
In most process lines, you don’t have time for guesswork. You need to know if the fluid is flowing properly, if bubbles are forming, or if there’s contamination starting to appear. That small glass window gives you all that, without shutting anything down.
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