What to Look For in a Professional Espresso Machine You'll need a machine with the ability to regulate the pre-infusion. This is essential for the development of flavor. PID temperature control is an attribute that many coffee experts look for in a professional espresso machine. If you're planning on hiring https://coffeee78434.webdesign96.com/30311047/9-signs-that-you-re-a-buy-espresso-machine-expert