KT 303 Digital Temperature Controller with defrost relay and two probes


  • Temperature measure range: -40~99°C
  • Controlling range:-40~85°C
  • Resolution: 0.1°C/1°C
  • Touchable display with wateproof


KT-303 Digital Temperature Controller Thermoregulator Thermostat Thermocouple Sensor with Refrigeration Defrost Function



1.More Waterproof,durable and easy to operate.
2.One key recovery of the factory default value parameters preset.
3.Six touch key design,quick parameter seting,with the key lock function.
4.It could measure,display and control temperature,with the function of temperature calibration, and temperature over temperature alarm and sensor failure alarm.
5.With refrigeration and defrosting function.

1.This controller is suitable for temperature control of the middle and low temperature cold storage or heating equipment.
2.High accuracy of temperature measurement,clear temperature value and more convenient observation.
3.Can be used for domestic freezer, water tanks, refrigerator,industrial chiller, steamer, industrial equipment and other temperature control applications.

KT-303 temperature controller is suitable for cooling and refrigeneration, has two relay and two temperature probes. Relay 1 switch compressor or refrigeration unit. Relay 2 is for defrost by hot gas ,fan,or coil wire.  Sensor 1 measure temperature in the cooling box and sensor 2 measure temperature for defrost.


  • Model:KT-303(Universal Refrigeration and defrosting type)
  • Color:Black
  • Power Supply:220V
  • Relay capacity:10A
  • Temperature measure range: -40~99°C
  • Controlling range:-40~85°C
  • Resolution: 0.1°C/1°C
  • Accuracy: ±1 °(-30~50°C)
  • Input: 2 NTC sensor
  • Ambient requirements: temperature: -5-60°C humidity: 10%-90%(Non condensate)
  • Consumption:≤5W
  • Sensor lenth:2M
  • Waterproof:Yes
  • Front Panel Size:85x35mm/3.32×1.37in
  • Mounting Size:70x28mm/2.73×1.09in
  • Item size: 85x35x62mm/3.32×1.37×2.42in
  • Item weight:158g/5.53ozPackage informations:
    Package size:100x81x60mm/3.9×3.16×2.34in
    Package weight:220g/7.7oz
    General Box Package

    Package included:
    1 x Digital Temperature Controller
    2 x Temperature sensor
    1 x Manual

    1.Please allow 1-3mm errors due to manual measurement.
    2.Item color displayed in photos may show slightly different on your computer monitor due to different monitors.


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