Extech 48VFL13 1/16 DIN Temperature PID Controller with 4-20mA OutputExtech 48VFL13 Temperature PID Controllers 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 drift. The Soft Start feature is