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Updated: 19 Apr 2026

10 Best Thermostat Controllers

#1 Best Pick
KETOTEK Digital Temperature Controller Thermostat Outlet Plug 240V with Sensor Probe, LCD Temperature Control Switch Timer for Greenhouse Fermentation

KETOTEK Digital Temperature Controller Thermostat Outlet Plug 240V with Sensor Probe, LCD Temperature Control Switch Timer for Greenhouse Fermentation

Brand: KETOTEK
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  • 【Relay output】 Plug-and-play design, relay output. Easy to program and safe to use. This Thermostat Plug Outlet can be displayed in Celsius or Fahrenheit. No backlight. Temperature control range:-40℃~120℃/-72℉~176℉. Power supply: 100~250V AC 50/60Hz. Output: Max 16A
  • 【Temperature control function】 Temperature control range:-40℃~120℃, temperature control accuracy: ±1%. This digital temperature controller plug is easy to program. Set start temperature and stop temperature, it will work in heating or cooling mode as programmed. (start temperature > stop temperature, cooling; start temperature < stop temperature, heating). This thermostat plug also supports temperature calibration if needs.
  • 【Timing function】 F01~F04 modes for cycle timing and countdown: F01 Cycle Timer mode; F02 Countdown ON mode, F03 Countdown OFF mode, F04 Countdown ON and Countdown OFF mode. You can choose F01 mode to control the device to work in cycles, or choose F02~F04 modes to countdown to turn on or turn off the device. Set range: 0~99 hours 59 minutes. Please note that this thermostat plug only works in one mode.
  • 【3m temperature sensor & more functions】 3 metre NTC 10K temperature sensor probe. Large LCD display without backlight. Temperature calibration. Reset function. Data storage function that all parameters set can be saved after power off.
  • 【Wide Range of Application】This temperature controller thermostat plug is widely used for greenhouse, reptile, incubator, terrarium, freezer, refrigerator, heater, fridge, homebrew, vivarium, fermentation, heat mat, and other temperature-controlled system. It can also be used as a timer for cycle timing and countdown.
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#2 Best Value
Temperature Controller Electric Thermostat AU Plug LCD Display Heating Cooling Mode

Temperature Controller Electric Thermostat AU Plug LCD Display Heating Cooling Mode

Brand: ecoartheating
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  • [SMART THERMOSTAT]-Heating & Cooling Mode, 1.7m NTC 10K temprature sensor probe, automatically turn on/off heating devices or cooling devices through your preset target temperature. Maintains stable room temperature and provides comfort and energy saving.
  • [Easy INSTALLATION & OPERATION]-No installation or wiring, Easy plug and play unit. Temperature control range:40℉~248℉(-40℃~120℃), Accurate temperature control of ±1℃ for consistent comfort. Choice of ℉ or ℃ temperature display on LCD.
  • [WIDE Effiective APPLICATION]- Digital thermostat suitable for most heating & cooling devices, such as greenhouse, reptile, incubator, terrarium, freezer, refrigerator, heater, fridge, homebrew.It can also be used as a timer for cycle timing and countdown.
  • [Timing function]- F01 Cycle Timer mode; F02 Countdown ON mode, F03 Countdown OFF mode, F04 Countdown ON and Countdown OFF mode. You can choose F01 mode to control the device to work in cycles, or choose F02~F04 modes to countdown to turn on or turn off the device. Set range: 0~99 hours 59 minutes. Please note that temperature control function and timing function cannot be used at the same time.
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#3 Budget Pick
Temperature Controller -50 to 110 Celsius (-58 to 230 F) DC 12V Programmable Heating/Cooling Thermostat Control Switch Module NTC Waterproof Sensor Probe Dual Color LED Display Monitor

Temperature Controller -50 to 110 Celsius (-58 to 230 F) DC 12V Programmable Heating/Cooling Thermostat Control Switch Module NTC Waterproof Sensor Probe Dual Color LED Display Monitor

Brand: REDPINGUO
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  • Temperature controller monitoring instrument, show the measured temperature (red) and set temperature (blue) at the same time. Can be used for cooling/heating control. Operating Voltage: DC12V 200mA
  • Measurement Range: -50 to 110 Celsius (-58 to 230 F), the C/F button allows you to switch between Celsius and Fahrenheit temperatures
  • Clear Working State: the relay is closed when the light is on, and the relay is disconnected when the light is off. It has high temperature protection.
  • With a waterproof NTC (10K 0.5%) temperature sensor probe, rogrammable heating/cooling mode, delay start, high temperature alarm, Celsius/Fahrenheit mode, etc.
  • Can be used for fish tank water temperature control, incubation field, equipment cabinet, air conditioning system, temperature control protection, control cabinet cooling system and other DIY temperature control systems.
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#4 Top Choice
2400W Digital Temperature Controller Plug in Thermostat Outlet Digital RV Thermostat Heating Cooling Mode Timer Socket 10A /240V Heating Cooling Control -40℃~120℃ with 2.0m Sensor

2400W Digital Temperature Controller Plug in Thermostat Outlet Digital RV Thermostat Heating Cooling Mode Timer Socket 10A /240V Heating Cooling Control -40℃~120℃ with 2.0m Sensor

Brand: REDPINGUO
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  • [SMART THERMOSTAT]-Heating & Cooling Mode, 2.0m NTC 10K temprature sensor probe, automatically turn on/off heating devices or cooling devices through your preset target temperature. Maintains stable room temperature and provides comfort and energy saving.
  • [Easy INSTALLATION & OPERATION]-No installation or wiring, Easy plug and play unit. Temperature control range:-40℃~120℃, Accurate temperature control of ±1℃ for consistent comfort.
  • 【Our Thermostat Wide Range of Applications】 This thermostat socket with probe is widely used for glass house, greenhouse,incubator,terrarium, refrigerators, fermentations, heating mat and other temperature controlled systems.
  • 【Temp Controller Other Features】 RV digital thermostat HD LED display with backlight, very easy to see the number, 2M cable can meet most plug in thermostat needs.
  • [Timing function]- F01 Cycle Timer mode; F02 Countdown ON mode, F03 Countdown OFF mode, F04 Countdown ON and Countdown OFF mode. You can choose F01 mode to control the device to work in cycles, or choose F02~F04 modes to countdown to turn on or turn off the device. Set range: 0~99 hours 59 minutes. Please note that temperature control function and timing function cannot be used at the same time.
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#5 Popular Choice
Bonlux Plug in Digital Thermostat Temperature Control, Heating and Cooling Reptile Thermostat Timer Plug Socket AU, Digital Temperature Controller for Greenhouse, Refrigerator, Homebrew, Aquarium

Bonlux Plug in Digital Thermostat Temperature Control, Heating and Cooling Reptile Thermostat Timer Plug Socket AU, Digital Temperature Controller for Greenhouse, Refrigerator, Homebrew, Aquarium

Brand: Bonlux
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  • 【Easy to use】 Plug and play design, just plug the device into the thermostat controller socket and set parameters, and the thermostat can work according to the settings. Support °C/°F display. Operating voltage: AC100-240V, 50/60Hz.
  • 【Preset temperature】 By setting the target temperature, the thermostat controller automatically turns on/off the heating mode or cooling mode, you don't need to pay attention to the temperature frequently, saving time. Temperature control range :-40℃~120℃(-40℉~248℉), temperature control accuracy :±1%. Degrees Celsius and Fahrenheit can be converted.
  • 【Memory function】 This thermostat controller has a memory function, once set the temperature parameters you want, it will automatical save the temperature data. The next time you use it, you don't have to reset the temperature. It's convenient and time saving, which gives you more time to focus on other things.
  • 【Timing function】 Bonlux‘s digital thermostat controller has four timing modes: F01:cycle timer mode; F02:countdown open mode; F03:countdown off mode; F04:countdown on and countdown off modes. The value ranges from 0 to 99 hours and 59 minutes. Note that the temperature control function and timing function cannot be used at the same time.
  • 【Wide applicatios】The digital thermostat controller can keep a stable temperature and comfortable environment for animals and plants, which can help your pet or plant grow up healthily. Digital thermostats are widely used in most temperature control system equipment, such as greenhouses, reptiles, incubators, glass containers, freezers, refrigerators, heaters.
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#6 Top Pick
Inkbird ITC-308 WiFi Digital Temperature Controller 220V Outlet Thermostat, 2-Stage, 2200w, w/Sensor Smart Thermostat Google Alexa IFTTT APP Support Remote Monitor Control

Inkbird ITC-308 WiFi Digital Temperature Controller 220V Outlet Thermostat, 2-Stage, 2200w, w/Sensor Smart Thermostat Google Alexa IFTTT APP Support Remote Monitor Control

Brand: Inkbird
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  • ※[WIFI & APP] WIFI smart controller supports both IOS & AndroidWIFI supports 2.4GHz Wi-Fi router, free APP “InkbirdSmart” which is able to monitor temperature at any time.
  • ※[Dual Relay Output] Dual relay output, which can connect heating and cooling device at the same time.
  • ※[Alarm for Safe] High/Low temperature limit setting alarm.
  • ※[Convenient Design] Plug-n-play, easy to use. Support ℃/℉reading and Temperature calibration.
  • ※[Long Warranty] The controller itself has 2 years warranty while the temperature sensor has 1 year warranty. Maximum output load: 2200(220V)2400W(240V).
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#7 Top Pick
Bonlux Plug in Digital Thermostat Temperature Control, Heating and Cooling Reptile Thermostat Timer Plug Socket AU, Digital Temperature Controller for Greenhouse, Homebrew, Aquarium, 2 Pack

Bonlux Plug in Digital Thermostat Temperature Control, Heating and Cooling Reptile Thermostat Timer Plug Socket AU, Digital Temperature Controller for Greenhouse, Homebrew, Aquarium, 2 Pack

Brand: Bonlux
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  • 【Easy to use】 Plug and play design, just plug the device into the thermostat controller socket and set parameters, and the thermostat can work according to the settings. Support °C/°F display. Operating voltage: AC100-240V, 50/60Hz.
  • 【Preset temperature】 By setting the target temperature, the thermostat controller automatically turns on/off the heating mode or cooling mode, you don't need to pay attention to the temperature frequently, saving time. Temperature control range :-40℃~120℃(-40℉~248℉), temperature control accuracy :±1%. Degrees Celsius and Fahrenheit can be converted.
  • 【Memory function】 This thermostat controller has a memory function, once set the temperature parameters you want, it will automatical save the temperature data. The next time you use it, you don't have to reset the temperature. It's convenient and time saving, which gives you more time to focus on other things.
  • 【Timing function】 Bonlux‘s digital thermostat controller has four timing modes: F01:cycle timer mode; F02:countdown open mode; F03:countdown off mode; F04:countdown on and countdown off modes. The value ranges from 0 to 99 hours and 59 minutes. Note that the temperature control function and timing function cannot be used at the same time.
  • 【Wide applicatios】The digital thermostat controller can keep a stable temperature and comfortable environment for animals and plants, which can help your pet or plant grow up healthily. Digital thermostats are widely used in most temperature control system equipment, such as greenhouses, reptiles, incubators, glass containers, freezers, refrigerators, heaters.
Check latest price on Amazon
#8 Top Pick
Inkbird ITC308 Digital Wired Temperature Controller AU Plug Dual Stage Heat Cool Controller for Beer Brewing Homebrew Aquaiurm Hatching Reptiles Greenhouse Freezer Fridge Sous Vide

Inkbird ITC308 Digital Wired Temperature Controller AU Plug Dual Stage Heat Cool Controller for Beer Brewing Homebrew Aquaiurm Hatching Reptiles Greenhouse Freezer Fridge Sous Vide

Brand: Inkbird
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  • [Easy to Use] Plug-n-Play Design & Supports °C/°F display
  • [Dual Relay] able to power refrigeration and heating equipment as conditions change
  • [Dual Display Window] Displays measured temperature and set temperature at the same time
  • [Buzzer Alarm] High and low-temperature alarms are available when the temperature is over or the sensor experiences a malfunction
  • [Safety Protection] Maximum output load: 2200W(220V)/2400W(240V). Customize temperature and compressor delay, protecting your refrigeration/heating equipment
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#9 Top Pick
Digital LED Temperature Controller Module Digital Thermostat Switch with Waterproof Probe Programmable Heating Cooling Electronic Thermostat Range from -50℃ to 120℃

Digital LED Temperature Controller Module Digital Thermostat Switch with Waterproof Probe Programmable Heating Cooling Electronic Thermostat Range from -50℃ to 120℃

Brand: REDPINGUO
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  • -50~120°C/-58~248℉ ultra-wide temperature control range, can be used in various temperature control fields;
  • Dual color LED display: this digital thermostat control module of dual color LED display, which show the measured temperature and set temperature at the same time, which can be applied for cooling/ heating mode, you can test indoor or outdoor temperature
  • Waterproof design: the NTC (10K 0.5%) one meter probe is waterproof, and you can control the temperature at will, can also control heating or cooling according to different needs
  • Reliable to use: the electronic temperature control switch module has been tested for consistency and reliability, and its control accuracy is 0.1 degrees Celsius, backlash precision is 0.1 degrees Celsius with high temperature protection
  • Although it's very easy to install ,but if you has any trouble please give we email, we will help you,Thank you for understand!
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#10 Top Pick
Digital Temperature Controller Thermostat Heating and Cooling Mode Outlet Socket with 1.7m Sensor for Carboy Homebrew Fermenter Greenhouse Terrarium 240V 10A 2400W

Digital Temperature Controller Thermostat Heating and Cooling Mode Outlet Socket with 1.7m Sensor for Carboy Homebrew Fermenter Greenhouse Terrarium 240V 10A 2400W

Brand: REDPINGUO
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  • 【Easy to use】 Plug-and-play design, just plug the device into this thermostat plug outlet and set parameters, it will work as programmed.Supports °C/°F display; Relay output
  • 【Easy to program】 Just set start temperature and stop temperature, this plug in thermostat will work in heating or cooling mode. Temperature control range:-40℃~120℃(-40℉~248℉), temperature control accuracy: ±1%. Celsius and Fahrenheit can be converted. This digital temeprature controller also supports temperature calibration if needed.
  • 【Dual Display Window】Displays measured temperature and set temperature at the same time.Temperature calibration. Reset function. Data storage function that all parameters set can be saved after power off.
  • 【Timing function】 F01 Cycle Timer mode; F02 Countdown ON mode, F03 Countdown OFF mode, F04 Countdown ON and Countdown OFF mode. Set range: 0~99 hours 59 minutes. Please note that temperature control function and timing function cannot be used at the same time.
  • 【Wide Range of Application】This temperature controlled outlet plug is widely used for greenhouse, reptile, incubator, terrarium, freezer, refrigerator, heater, fridge, homebrew, vivarium, fermentation, heat mat, and other temperature-controlled system. It can also be used as a timer for cycle timing and countdown.
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