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Temperature Controller Product Size:7x3.5x7.5CM Bore Size:70x29MM Main function Temperature display, temperature controlling(refrigeration/heat mode can be set),compressor start delay protection, 2 defrost modes (electric heat, hot gas), 2 defrost start mode (time alternation, accumulative compressor running time), 2 defrost end mode (timing, controlled by both temperature and time), dripping, manual defrost, sensor error alarm, one external alarm input, password, C/F unit change. Main Technique Index 1,Temperature display range: -50 150°C(The resolution is 0.1°C) -58 302°F(The resolution is 0.1°F)2,Power supply: AC 220V±10% or AC 380V±10% 50Hz (Refer to the wiring diagram)3,Operating environment: temperature -10°C 50°C, humidity≤85%4,Relay contact capability: compressor 20A/250VAC, defrost 8A/250VAC (pure resistive load)5,Temperature sensor: NTC R25=5kΩ, B (25/50) =3470K