What to Look For in a Professional Espresso Machine You'll need a machine that can control pre-infusion, which is important for developing aroma and flavor. PID temperature control is also an option that many coffee experts look for in an espresso machine that is professional. If you plan on hiring https://www-coffeee-uk03044.bloguerosa.com/29141862/14-questions-you-might-be-afraid-to-ask-about-buy-espresso-machine