... Temperature Controller 1. TC/RTD universal input, 2. 2 line 4 digit display 3. Relay, SSR or 4-20mA output controller ... Digital Temperature Controller Toky AI508 (48mm*96mm) series temperature controller with following features: a. TC ... heating/cooling or slow heating system), e. option control output, modularization design, f. high anti-interference, 110-240V ...