Precision Digital P/N PD520-A-CTD, Series SuperNova, Auto-Tune PID Controller , Three Lines, White, Green and Amber Display, 4-20 mA, 0-10 V, Thermocouple, RTD Input, 100-240 VAC Power, (1) Control Current (SCR), (1) H&C Control Relay, (2) Alarm Relays, (