... 1. TC/RTD universal input, 2. 2 line 4 digit display 3. Relay, SSR or 4-20mA output controller Digital Temperature ... . TC/RTD/analog signal universal input,selected by software; b. display, alarm and adjust function, c. advanced two freedom degreePID arithmetic, d ... , f. high anti-interference, 110-240V AC/DC, one alarm or two alarm can be choosed, applicable to system tempreature control environment.