Single and double boiler espresso machines can have greater temperature control if a PID is installed to more minutely manage the thermostat on the boiler. In this video, Gail talks about what a PID is and gives us the lowdown on why you might want one and how you can get one.
Ask the Experts: What's a PID?
Kat is a passionate coffee enthusiast and seasoned blogger. Read her posts for insights on brew methods, coffee recipes, and machine reviews.