Isomac TEA Espresso Machine with PID DisplayIsomac TEA Espresso Machine with PID Display The Isomac TEA Espresso Machine with PID display is a very viable option for the prosumer that is looking for a machine with all of the advanced features expected on a commercial machine at an affordable price. Designed with a host of attractive features including a professional mirror finish polished stainless steel exterior, PID control and display, 1. 2 liter stainless steel boiler with heat exchanger