The microprocessor based controllers use latest two fuzzy control process. Features include tuning, two outputs, remote set input, transmitter output universal signal input, inputs. Sensor break protection also provided. Output can be selected from relay, ssr 20 ma. Non-volatile memory in the instrument store the programmed parameters. It has self-diagnostic fear and offer three-point alarm. The instruments can also retransmission output and can also provide temperature profile control. Two patterns of eight seen each can be programmed in the instruments. The ram soak are provided with their standard model controller without any additional charges. These pid controller operate on wide power supply, ie, 85 to 265 v ac. Ideally suited for plastic machines, furnaces, temper baths, process control, heat treatment unit, etc.