4-Digit Dual Display PID Temperature Controller is a process in which change of temperature of a space (and objects collectively there within), or of a substance, is measured or otherwise detected and the passage of heat energy into or out of the space or substance is adjusted to achieve the desired temperature. Features: Selectable input (Thermocouple, Pt100, Current, Voltage) Fully programmable via the front fascia Optional initial pre-heating RAMP function Automatic/manual operation Dual programmable alarm Specifications: Brand Name: Max Measuring Temperature : 120 ° C and Above Style : Standing Station Usage : Industrial Theory : Temperature controller Display Type : DIGITAL Power Type : Charger Screen size : 1.9 Inches and Under Model Number : CH902,CH702,CH102,CH402 Product : temperature controller Function : Heating and cooling Output : 2 relay output size : 96 * 96mm Mounting hole size : 92 * 92mm temperature range : 0-400 degrees Celsius thermocouple type : J type Package Includes: 1 x 4-Digit Dual Display PID Temperature Controller