The ETC023 universal temperature controller provides accurate regulation of temperature, pressure and flow in applications such as furnaces, ovens and environmental chambers. It includes a human/machine interface, auxiliary current output, input/output isolation, automatic tuning with fuzzy logic overshoot suppression and universal ac power supply. It can be inserted into existing panel installations. The unit also has high noise immunity, dual display, auto/manual dual set points, set point ramp, failsafe outputs, two alarms, UL recognition and CSA certification. Its nonvolatile memory ensures data integrity during power loss, and four configurable security levels help prevent accidental or unauthorized changes to the process.