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 to develop flavor and aroma. PID temperature control is also a feature that many coffee experts look for in a professional espresso machine. If you https://wwwcoffeeeuk36618.prublogger.com/29318264/14-questions-you-might-be-afraid-to-ask-about-buy-espresso-machine