What makes you worry whenever selecting the best temperature controller? Why do we need temperature controller? To answer these questions let me tell you what temperature controller means. Temperature controller is a process in which change of temperature of a space (and objects collectively there within) is measured or otherwise detected, and the passage of heat energy into or out of the space is adjusted to achieve the desired average temperature.  Temperature controllers are needed in any situation requiring a given temperature be kept stable. This can be in a situation where an object is required to be heated, cooled or both and to remain at the target temperature (setpoint), regardless of the changing environment around it. Do not be worried where you can find it! Here I am going to tell you how the best top ten temperature controllers work and where they can be found.  What is special, they are the quality products which can be reliable. Enjoy reading this post below!

10. Umlife W1209 Temperature Controllers

The Umlife W1209 is a single-stage device that comes in a pack of two. This allows you to control heating and cooling devices simultaneously, but separately. Alternatively, the second unit can be wired redundantly as a backup.

  • Very affordable option
  • Runs on 12 volts dc
  • Only displays in celsius

9. Willhi WH1436A Temperature Controllers

the latest version of the Willhi WH1436A features a higher power rating than previous models, and now includes a waterproof probe. Its four-digit display bests many options in this category, and makes precise monitoring possible at temperatures above 100 degrees.

  • 1100-watt maximum load rating
  • Heating and cooling modes
  • Single-stage only

8. Inkbird ITC-1000 Temperature Controllers

For users who don’t believe plug-and-play functionality should include a tangled mess of cables, the Inkbird ITC-1000 offers the same utility as the company’s ITC-308 model, but presents it in a different body that is ready for recessed installation and hardwiring.

  • Affordable option
  • One-year warranty
  • Requires some electrical knowledge

7. Bayite BTC201 Temperature Controllers

The two-stage Bayite BTC201 is outfitted with a pair of Goodsky relays that are rated for 15 amps apiece. With the unit only rated to run on 10 amps at 110 volts, you can expect these oversized moving parts to help improve the longevity of this option.

  • Includes updated user manual
  • Four-digit display
  • Waterproof probe with 3-meter cord

6. Poniie PN160 Temperature Controllers

Although, the Poniie PN160 has a rated output of 1,100 watts, that only applies to resistive loads – such as inline fans and radiant heaters. Those who intend to power inductive loads – such as refrigerator compressors – will be limited to an 800-watt maximum.

  • Simple design makes for clean setup
  • Accurate to within 1 degree
  • Rated for 16 amps input current

5. Johnson Controls A421 Temperature Controllers

From a company that’s been at the forefront of climate-control technology since the nineteenth century, the Johnson Controls A421 improves upon the design of its A419 model by enabling users to switch between heating and cooling modes with the push of a button.

  • Optional nema 4x weatherproof box
  • Sensor cables available from 2m – 6m
  • Adjustable backlit lcd screen

4. Inkbird ITC-308 Temperature Controllers

Running on 110 volts and capable of controlling up to 10 amps of current, the Inkbird ITC-308 is a two-stage device. Its twin screens display current settings and ambient conditions side by side, in either Celsius or Fahrenheit.

  • Simple plug-and-play design
  • High and low temperature alarms
  • Delay protection for compressors

3. Inkbird ITC-106VH Temperature Controllers

To avoid the possibility of burnout caused by racing equipment, those requiring exceptional precision should consider the Inkbird ITC-106VH , which combines proportional, integral and derivative control to create stable ambient conditions.

  • Includes heat sink
  • Solid state relay
  • Tuning required for best results

2. Digiten Digital Thermostat Outlet Temperature Controllers

While it is a little pricier than some other single-stage options, the Digiten Digital Thermostat Outlet offers a higher output rating than most offerings in this category, and is capable of providing up to 15 amps of current to heating and cooling devices.

  • Lcd screen with automatic shutoff
  • Submersible sensor with 2-meter cord
  • Retains settings if power fails

1. Inkbird WiFi ITC-308 Temperature Controllers

Based on one of the company’s most popular designs, the Inkbird WiFi ITC-308 incorporates wireless communications into its design, allowing users to monitor conditions and adjust settings remotely from any iOS or Android device.

  • Includes inkbirdsmart app
  • One-year warranty for sensor
  • Two-year warranty for controller

How to Choose the Temperature Controller

For craft brewers or for those involved in Homebrewing, the temperature monitoring is one of the crucial stages for obtaining a good beer. There are several steps in the brewing process, which include malting, mashing, lautering, boiling, fermenting, conditioning, filtering, and packaging.

In particular, there are two phases in which the temperature level should be controlled: the mashing (mixing the milled malt with hot water) and the fermenting (the higher is the temperature, the faster and the more turbulent is the fermentation).

According to the different needs it is possible to choose between two paths: the home made devices based methods or the professional devices based methods.

For example, with the open-source electronic platform “Arduino”, it’s possible to create an home made temperature controller simply with a temperature sensor and a relay module (and, of course, some programming skills).

The integration with Raspberry PI regarding the project “BrewPi” allows more advanced algorithms and real time interactive graphs. In the near future the device may support mash control (BIAB, HERMS or RIMS).

On the other way, for more professional uses it is recommended to purchase a specific temperature controller, in order to facilitate the whole process automation. For instance, we consider the need to control two electric boilers with different time/temperature steps.

If you want to use electric resistances controlled by contactors or on-off static relays and you need to independently manage two boilers (with different time/temperature steps and start times), we suggest a brewing temperature controller enabled to program at least 15 cycles. Hence, the device shall be designed to program cycles/curves with control of the process variable in relation to time. A useful feature may consist in recovery the controller status after a power cutoff, in order to avoid the reset process.

Instead, if you want to manage two boilers with one master controller (where a second slave controller is related to the setpoint value of the first controller, by managing the output independently from the detected temperature), we suggest two programmable controllers, connected with serial interfaces. In industry there are two serial interfaces: RS422 and RS485; check the two controllers have the same interface before buying them. The best thing to do is, of course, purchasing two temperature controllers from the same manufacturer.

Notice that programming an industrial thermoregulator can be easier that you might think: just check if the manufacturer has provided some inherent video tutorials, or ask the numerous PID/PLC communities that may help you about temperature controller using microcontroller.