Digital Temperature Controller 1. TC/RTD universal input, 2. 2 line 4 digit display 3. Relay, ... Toky AI508 series temperature controller with following features: a. TC/RTD/analog signal universal input,selected by software; b. display, alarm and ... -interference, 110-240V AC/DC, one alarm or two alarm can be choosed, applicable to system tempreature control environment.