Features 【Hot Water Temperature Controller】: The water heater temperature controller is used for solar water heaters, controlling the output by temperature difference and temperature, and automatically keeping the water temperature within the temperature difference. 【High-Quality Material】: The thermostat with a probe is made of stainless steel shell, resin sealing, waterproof and not rust, not easy to deform, strong resistance to external resistance, and solid durability. 【Working Principles】: The working voltage of the smart temperature switch: is AC 220V, with two output control, and the temperature difference controls two temperature areas. When the temperature reaches the set value, the water pump cycle is automatically activated to balance the temperature of the two temperature areas. 【Control Heating】: Another channel controls electric heating. When solar energy heating fails to reach the set temperature, the electric heating system can automatically start and heated to the set temperature. 【High Accuracy】: The digital thermostat with a sensor controls the heating system and automatically keeps the water temperature within the temperature difference range. The heating control range of 2 ℃ ~ 99 ℃, and the precision of ± 1 ° C is a professional temperature difference starting the temperature controller. Features: 1. The water heater temperature controller is used for solar water heaters, controlling the output by temperature difference and temperature, and automatically keeping the water temperature within the temperature difference. 2. The thermostat with a probe is made of stainless steel shell, waterproof and not rust, and has solid durability. 3. With two output control, the temperature difference controls two temperature areas. When the temperature reaches the set value, the water pump cycle is automatically activated to balance the temperature of the two temperature areas. 4. When solar energy heating fails to reach the set temperature, the electric heating system can automatically start and heated to the set temperature. 5. The heating control range of 2 ℃ ~ 99 ℃, and the precision of ± 1 ° C is a professional temperature difference starting the temperature controller. Specifications: Working Voltage: AC 220V ±10%(50Hz/60Hz) Output Load: 5A / 220V / AC Power Consumption: ≤3W Heating Control Range: 2℃~99℃ Temp. Difference Start Control: 3℃~50℃ Resolution: 1℃ Precision: ±1℃ Input Signal: 2-channel sensor, 20KX1.5MX2 Size: 76*76*35mm/2.99*2.99*1.37inch Operating Temperature: -10℃~50℃ Operating Humidity: RH≤90% Light Function Setting Range Default Unit #1 temperature difference start-stop pump temperature difference +1~50 5 ℃ #1, #2 stop pump temperature difference 1~temperature difference start-1 2 ℃ #2 temperature return difference 1~20 5 ℃ #3 high-temperature correction -10~10 0 ℃ #4 low-temperature correction -10~10 0 ℃ Package Includes: 1 x Temperature Controller 2 x Sensor Probes Package List