Best Automatic Temperature Control Relays in 2026

🌟🌟【Two Modes】Have two relays. Switch between cooling and heating modes. Support °F/°C display.

🌟🌟【Setting Value】Control the temperature by setting the temperature set value and the difference value.

🌟🌟【Different Functions】Refrigerating control output delay protection, and temperature calibrating.

🥇🥇【Easy to use】 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.

👍👍【Android & IOS WIFI App】WIFI APP - WIFI smart controller supports both IOS & Android. WIFI connection supports 2.4GHz Wi-Fi band with free “INKBIRD” APP to control the temperature remotely.

👍👍【Dual Relay Output】Dual relay - able to power refrigeration and heating equipment as conditions change.

👍👍【High/Low Temperature Alarm】 Set High/Low temperature alarm when the temperature is over or under preset temperature or the sensor experiences a malfunction.

100% complete machine patch, wave soldering, stable performance, good consistency.

Embedded CPU chip (MCU), more intelligent, lower power consumption.

Automatic power set memory (MCU built-in EEPROM memory unit).

【Output】2 Relays, control the temperature by setting the temperature set value and the difference value.

【Mode】Automatic switch between cooling and heating modes, Fahrenheit and Celsius display can be choose.

【Calibration】Temperature calibrating, refrigerating control output delay protection.

A digital controller to equip AC Infinity devices with smart controls to create the optimal environment.

Control up to four devices from fans to grow lights and provide each with independent programming.

Automate devices to dynamically change speed and brightness in response to temperature and humidity.

High quality ;Mini and light weight design; large and clear LCD display.

Auto converts cooling and heating modes to keep your equipment in an ideal temperature range. .Have 2 relays .Switch between cooling and heating modes. Support celsius display.

Wide temperature range (-50-99 °C); dual heating and cooling function.

100% complete machine patch, wave soldering, stable performance, good consistency.

Embedded CPU chip (MCU), more intelligent, lower power consumption.

Automatic power set memory (MCU built-in EEPROM memory unit).

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.

What will receive: you will get 2 pieces of direct-current 12V 200 mA temperature controllers, the measurement temperature is from -50 to 110℃(-58 to 230℉), the control and backlash precision: 0.1 Celsius, the refresh rate: 0.5 s, the module size: 48 x 29 x 32 mm/ 1.89 x 1.14 x 1.26 inch, the probe length: 1.5 inches, the cable probe length: 1 ft

Dual color LED display: this digital thermostat control module of dual color LED display, which show the measured temperature (red) and set temperature (blue) 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%) probe is waterproof, and you can control the temperature at will, can also control heating or cooling according to different needs

Reliable Workmanship for a Long Lifespan: mainly made of quality ABS, the temperature relay switches are compact and sturdy in structure, not easy to break, able to keep off water, thus serving you for a long time; The temperature control devices are equipped with stainless steel probes, hardly rusting, having nice working performance

2 Modes for Flexible Operating: there are 2 working modes of the digital temperature controller, one is the heating mode, the other is cooling mode; The temperature can change from minus 50 degrees centigrade to 110 degrees centigrade, and the temperature control accuracy can reach 0.1 degree centigrade, so you can adjust the temperature controller according to your actual needs

Satisfactory Practicality on Various Occasions: the freezer temperature regulators have a wide range of applications; You can apply them to improve your air conditioning system, refrigeration system, incubation zone, equipment cooling efficiency and so on

【OPTIONAL WORKING MODE】-- Optional heating/cooling working mode and working status is indicated by LED indicator

【WORKING POWER SUPPLY】-- Working power supply voltage AC/DC 24V‑240V, rated power supply frequency is 50/60Hz

【35MM RAIL INSTALLATION】-- Rated impulse withstand voltage is 2.5kV, using 35mm rail installation is easy to use

【Super Material】: W3001 intelligent thermostat has flame retardant housing is avirulent environmental protective and high safety, strong impact resistance, heat and low temperature resistance, ageing resistant, sturdy and durable, is your side temperature control housekeeper

【Two Working Modes】: This digital LED temperature controller module has 2 working modes, heating ( start temperature is less than stop temperature), Cooling ( start temperature is above than stop temperature). Range from -50℃ to 110℃. High temperature control precision of 0.1℃

【Waterproof Probe】: Equipped with a 1-meter NTC10K probe, easy to use. The Probe used stainless steel material, waterproof and can last for a long time

ABS Safety and Durable Material: This Digital Temperature Controller adopts with ABS flame retardant plastic shell, which is more safe to use

Thermostat Temperature Humidity Controller: This Temp Thermostat Digital Control Switch is a microcomputer intelligent digital display thermostat, dual display dual temperature

Convenient to Use: This Digital Temperature Controller Thermostat is equipped with NTC Sensor for convenient usage, line length is about 1 meter

The instruction manual is in the last few pictures, if you need detailed electronic documents, please contact us

2 Working modes: this digital LED temperature controller module has 2 working modes, heating mode (start temperature is lower than stop temperature) and cooling mode (start temperature is higher than stop temperature), range from -50°C to 120°C; The high temperature control accuracy reaches 0.1℃.Stable and reliable: the LED indicator light can display the current output status; The digital display tube can display the measured temperature, and the temperature measurement and control accuracy is high

Waterproof probe: equipped with a 1-meter NTC10K probe made of stainless steel, which is waterproof and not easy to rust, easy to use and can last for a long time

4Pieces W1209 Temperature Controller Board with Case 12V DC Micro Digital Thermostat -50-110 Degrees Celsius Electronic Temp Control Module Switch with Waterproof NTC Probe

NTC probe: the NTC probe is waterproof and can control the temperature, allowing to control heating or cooling; Please note that the wood laminate case is the clear plastic case; You need to tear the wood outside layer off carefully, and the outside layer is very thin, which can protect the inside to prevent scratches; And you need to assemble and install the case by yourself

Performance: embedded CPU chip, MCU, more intelligent, lower power consumption; Automatic power set memory, MCU built-in EEPROM memory unit