What to Look For in a Professional Espresso Machine You'll want a machine that has the ability to control the pre-infusion process, which is crucial for establishing aroma and flavor. PID temperature control is an option that many coffee experts search for in an espresso machine that is professional. If https://wwwcoffeeeuk79363.rimmablog.com/29334323/20-tools-that-will-make-you-better-at-buy-espresso-machine