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220v controller for the solar hot water heating system suitable for 1 collector array * 1 storage tank * 1 pump and auxiliary heating Appearance of controller 187mm*128mm*46mm 1*Pt1000 sensor (less than 500 cel.degree) for collector (silicon cable less than 280 cel.degree) 2*NTC10K, B3950 sensor (less than 135 cel.degree) for tank, (PVC cable less than 105 cel.degree), Accuracy of temperature measuring: +/-2 Cel. Degree Range of collector temperature measuring: -10 to 220 Cel. degree Range of tank temperature measuring: 0 to 110 Cel. Degree