Agree with Leo on this one. Easy to switch probes from pot to pot or device to device when it’s a separate unit. Also, reviews and feedback I got from RCBS all points to built in units need special care with cool down procedures. RCBS PM2 has a fan that cools the PID, if you unplug and walk away from a hot pot the heat will fry the circuits in the PID. Independent PID eliminates that issue.