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 establishing aroma and flavor. PID temperature control is an attribute that many coffee experts look for in an espresso machine that is professional. If you're planning on https://coffeee-uk46127.blogars.com/29116700/so-you-ve-bought-buy-espresso-machine-now-what