Characteristics: The products are used in solar water heaters, the temperature difference and temperature to control the output power. It is equipped with a control of two outputs, control of the temperature difference in two temperature zones. When the temperature reaches the set value, it automatically starts the water pump circulation and brings the temperature balance in the two temperature zones. The second channel controls the electric heating, when the solar heating does not reach the set temperature, the electric heating system can automatically start and heat up to the set temperature. It will control the heating system and automatically keep the water temperature within the temperature deviation. Technical data: Working voltage: AC220V ± 10% (50Hz / 60Hz) Output load: 5A / 220V / AC Power Consumption: ≤3W Heating control range: 2 ℃ ~ 99 ℃ temp. Differential start control: 3 ℃ ~ 50 ℃ Resolution: 1 ℃ Precision: ±1℃ Input signal: 2-channel sensor, 20KX2MX2 Size: 76 * 76 * 35mm / 2.99 * 2.99 * 1.37in Working temperature: -10 ℃ ~ 50 ℃ Working humidity: RH≤90% Light function Setting range Default Unit No.1 temperature difference start stop pump temperature difference 1~50 5℃ #1, #2 stop pump temperature difference 1~temperature difference start-1 2℃ #2 return temperature difference 1~20 5℃ #3 high temperature correction -10~10 0 ℃ #4 low temperature correction -10~10 0 ℃ The package includes: 1 x temperature controller 2 x sensor probes Note: