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What to Look For in a Professional Espresso Machine You'll need a machine that has the ability to regulate the pre-infusion. This is important to develop flavor. PID temperature control is an option that many coffee experts search for in a professional espresso machine. If you're planning on hiring baristas who have no experience, you'll require a machine that is easy to use and quick to train new employees on. This is essential when you are planning to operate a drive-through