PID330MH-0000 PID330 PID Temperature Controller, 96 x 96 (1/4 DIN)mm, 2 Output Relay, 85 to 270 V ac Supply Voltage. The Tempatron PID330 series temperature controller has a supply voltage rating ranging from 85VAC to 270VAC. This auto-tuning PID controller has a width of 96mm and a height of 96mm (1/4 DIN)device. It has selectable thermocouple, RTD or analogue inputs. The controller has two relay output. It has a large dual 4 digit LED display to show the setpoint and the process value.