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Inkbird Dual Stage Digital Temperature Controller
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The Inkbird dual stage temperature controller is an easy to use and economical controller that is perfect for home brewing. Inkbird controllers allow you to control both heating and cooling, and set independent differentials for each to protect your heating and cooling devices.

The Inkbird ITC-308S controller performs many of the same functions as the Ranco or Johnson but at a more affordable price, making it a great alternative for temperature control.  Aside from brewing uses, this is a great dual relay output temperature controller for cooking (use in a smoker or bbq), home growing (heat mats for seedlings, climate control), or any other DIY project you come up with!


  • Simple plug and play design with user friendly LED interface
  • Dual stage ITC-308 - control both heating and cooling
  • Adjustable Heating/Cooling differential
  • 1000W max power
  • Celsius or Fahrenheit
  • High and low temperature and sensor fault alarms
  • Can control temperatures of -58° F through 210° F (-50° C - 99° C)
  • Body Dimensions: 5.5 in x 2.7 in x 1.3 in
Item # FE640
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 1LBS
Community Q&A

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Why did you choose this?
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Reviews and price
Brad N on Feb 21, 2018
For my chest freezer fermentation chamber...
Vaughan L on Feb 3, 2018
Reviews and price
Brad N on Feb 21, 2018
Eric J on Feb 3, 2018
For my chest freezer fermentation chamber...
Vaughan L on Feb 3, 2018
able to adjust heat and cold with same controller
Darrin C. on Jan 27, 2018
2nd Ferm chamber (chest freezer) temp control
Valued C on Jan 22, 2018
Chris C on Jan 18, 2018
cheap, good reviews
Christopher W on Jan 17, 2018
Affordable and had good reviews
Cleve E M on Jan 17, 2018
Eric J on Feb 3, 2018
able to adjust heat and cold with same controller
Darrin C. on Jan 27, 2018

4.8 / 5.0
10 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Super easy and does the job
I have 3 of these in use. Easy to use and and works great
February 17, 2018
1 month ago
Very affordable temperature control that is simple and has worked great for my keezer. I would definitely buy more for future projects.
February 14, 2018
1 month ago
Great, inexpensive, very easy to use device.
Works perfectly. Very easy to use. More easy to use than Johnson controllers.
February 8, 2018
2 months ago
Simple, easy to use temperature controller
This temperature controller is easy to use and requires little to no fuss. Just plug it in set your temperature and go. It allows you to change how far from your set temperature the freezer will go both on the hot and cold side.
January 29, 2018
I use this for things other than brewing. It’s a great device and seems very accurate
January 24, 2018
1 month ago
Great temperature displays
I bought this to replace a 15 year old Ranco that just died (E2 code) on my leader. I really like the display showing the set temp and actual temp in bright, easy to see LEDs. Much better than the Tango display, and I loved the price to boot. Don't know about long term reliability yet, but so far I'm happy with the controller.
December 7, 2017
Great Product
This is a great product at a fraction of the cost of other products like the Johnson A419 (I have both and they work equally as well). I can assure you that this is one of the cheapest pre-wired temperature controllers on the market! Works great in any chest freezer or fridge for fermentation needs or for a kegerator. Very pleased.
May 12, 2017
Make sure you CALIBRATE!
I now own two of these - one to control a fermenting refrigerator, the other to control my beer keezer. The first one I purchased went on the keezer, but when I needed to ferment a fresh brew, I took it out and replaced it with my Johnson Controls A419 (which is only a single-stage). As soon as I plugged the unit in, it read a bit warmer than the Inkbird had, which caught my attention. I calibrated the unit using my Thermapen, and the inkbird was off by 1.7 degrees after stabilizing.

For the record, I bought a second Inkbird and calibrated it - it matched the Thermapen precisely in 32? ice water.

Also another word of caution - the alarm settings don't adjust automatically with the set temperature. So when it was set to 68 degrees with an alarm at 60, and then I set the target temp down to 33 to cold-crash, I woke up in the middle of the night to the unit beeping because it had dropped below the 60? alarm. Of course, simply changing the alarm took care of the issue, and this is by no means a complaint - just something to keep in mind.

The good news is the unit is VERY easy to setup for first-time use, and seems to do a wonderful job - I've already fermented several beers with my Inkbirds, set to a 1-degree variance from the target temp, inside a refrigerator with a Ferm-wrap heater, and I've been extremely pleased with the results so far. I love how easy it is to go from fermenting temps, to diacetyl rest, to cold-crashing with just a few button clicks.
May 9, 2017
Great Product and Price
I purchased one of these off Amazon about a year and a half ago, and since bought a second. Originally used for keeping sour beers warm during fermentation, the second one I purchased was for my chest freezer to maintain temps while lagering. For the price there isn't a better temp. controller that I have seen.
April 19, 2017
Great price and does the job.
This is probably the best temperature controller I have used. I use it in a freezer with a paint can heater as the heat source. I have noticed great control at low temps and with that setup was able to ramp up to 86F on a Belgian Golden Strong with an outdoor temp in the 50s at night. Great value.
April 19, 2017