Extech 48VFL11 1/16 DIN Temperature PID Controller with One Relay OutputExtech 48VFL11 1 16 DIN Temperature PID Controller with One Relay Output Temperature PID Controllers Fuzzy Logic PID, Auto Tuning, and Soft Start features combine for uncompromising, state of the art control. Extech controllers now offer Fuzzy Logic enhanced PID and a Soft Start feature that protects heaters from cold starts. PID plus Fuzzy Logic tackles even the most demanding applications, eliminating over shoot, unwanted process fluctuations, and