What to Look For in a Professional Espresso Machine You'll need a machine that can be controlled the pre-infusion, which is essential for developing flavor and aroma. PID temperature control is an attribute that many coffee experts search for in an espresso machine that is professional. If you're planning on https://coffeee17921.bloggerchest.com/29707476/5-killer-quora-answers-on-buy-espresso-machine