[Simple to Use]: Temperature range: -40°C to 110°C. Easy to set and adjust, featuring a high-definition LCD display and four control buttons. This is a relay-based temperature controller; an external power supply is required for the connected load. [High-Current 30A Relay]: Rated for 220V AC, 30A. Suitable for high-power applications such as refrigerators, brooders, incubators, fermenters, and greenhouses. Connect the power supply and heating/cooling device, place the sensor probe, set the desired temperature, and the unit operates automatically. [Heating/Cooling Function]: – Heating Mode ('H'): The relay activates when the measured temperature is less than or equal to (set temperature – hysteresis value); it deactivates when the measured temperature reaches the set temperature. – Cooling Mode ('C'): Operates inversely — relay activates when the measured temperature is greater than or equal to (set temperature + hysteresis value); it deactivates when the measured temperature falls to the set temperature. [Delay Start & Temperature Correction]: – Delay Start ('OPH'): After completing a heating or cooling cycle, the system begins a timed delay ('T'). Once 'T' equals the configured OPH value, the next heating or cooling cycle starts. – 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]: When the measured temperature reaches the preset alarm threshold, the unit triggers audible and visual alarms and cuts off 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 power temporarily. 5. Connect the load (heating/cooling device) to the relay output terminals. 6. Reconnect power to the controller. 7. Verify operation. Color: As shown in product images Material: Plastic Package Includes: 1 × XY-DT01 Digital Temperature Controller Note: Colors may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3°C.