The TC4AO by ARICO Technology Co., Ltd. is a temperature controller with indicators for thermocouple-break. One can choose from ON/OFF or proportional control and to its five alarm output modes. It has an analog setting without display, 12 V DC Relay or Voltage output type, option for with or without alarm, and it can have an H, B alarm output and none as Heater or Thermocouple indication.