[Simple to Use]: The temperature range for this temperature controller is -40°C to 110°C. Easy to set and adjust, with HD LCD display and 4 buttons. It is a relay-based temperature controller; an external power supply is required for the load. [High Current 30A Relay]: Rated for 220V AC, 30A. Suitable for high-power equipment such as refrigerators, brooders, incubators, fermenters, and greenhouses. Connect the power supply and heating/cooling device, place the temperature probe, and set the desired temperature — it operates reliably. [Heating/Cooling Function]: Heating Mode ('H'): When the measured temperature is less than or equal to the set temperature minus hysteresis, the relay activates to power the heating device. When the measured temperature reaches the set temperature, the relay deactivates and heating stops. Cooling Mode ('C') operates on the same principle. [Delay Start & Temperature Correction Function]: Delay Start ('OPH'): After completing a heating or cooling cycle, the system begins a timer 'T'. When 'T' equals the preset 'OPH' value, the next heating or cooling cycle starts automatically. Temperature Correction ('OFE', range: -10.0°C to +10.0°C): Compensates for long-term measurement drift. Actual temperature = measured temperature + correction value. [High Temperature Alarm Function]: When the actual temperature reaches the alarm threshold, the system triggers audible and visual alarms and cuts off the relay output. Press any button to silence the alarm. Usage Steps: 1. Connect the temperature sensor to the controller. 2. Connect the controller to its power supply. 3. Set the target temperature, hysteresis, and temperature correction value. 4. Disconnect the controller’s power supply. 5. Connect the load (heating/cooling device) to the relay output terminals, ensuring proper power supply wiring. 6. Reconnect the controller to its power supply. 7. Test and begin operation. Color: As shown in image Material: Plastic Package Contents: 1 x XY-DT01 Digital Temperature Controller Note: Other accessories or devices shown are not included. Note: Color appearance may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.