Inkbird Digital Temperature Controller

Inkbird 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 keep the exact temperature you need.

The Ink bird 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 1 LBS
Community Q&A

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Browse 6 questions Browse 6 questions and 20 answers
Why did you choose this?
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friend recommendation
Antonio F on Jan 31, 2023
replacement for older controller
jimmy b on Dec 20, 2022
friend recommendation
Antonio F on Jan 31, 2023
was the deal of the day
Kevin Rodriguez on Jan 20, 2023
replacement for older controller
jimmy b on Dec 20, 2022
Economical temp control unit.
John W on Dec 13, 2022
Good value for dual controller (heat/cool)
Charles H on Nov 16, 2022
Old one dies
Jay H on Oct 11, 2022
Price and reputation
Patrick G on Oct 7, 2022
Other one died
Douglas Frazer on Sep 26, 2022
to regulate fermentation, cold stabalization, and keg temperatures
Gunnar A on Aug 18, 2022
already have one and thought it would be easier to be consistent with products
Steven Lobaugh on Aug 9, 2022
price and function
Jonathan F on Jul 7, 2022
to use with a fermentation freezer
LOU H on Jun 6, 2022
Keep control of temp on fermenters
Tanya M on May 10, 2022
Will maintain my Fermentation Temps
Nicholas T on May 7, 2022
New fermentation box project
Valued C on Apr 20, 2022
Support your local brewer
Brian P on Mar 24, 2022
I need one
Michael D on Mar 15, 2022
My husband asked me to order this for him.
Michele G on Feb 28, 2022
Decent rating and positive comments for the most part.
Ken G on Jan 26, 2022
I was recently given a blanket heater, but need a control.
Dan Van N on Jan 22, 2022
Have heard good things
Bob R on Jan 22, 2022
Gail A K on Dec 10, 2021
Temp control for chest freezer kegerator
Karl M on Nov 9, 2021
Got this to go with a Danby DCF072A3BDB to occasionally do temperature-controller fermenting for two buckets at a time.
Daniel Blakemore on Nov 1, 2021
To turn my freezer into a cold stabilization cooler.
MICHAEL WENDT on Nov 1, 2021
Pair with the thermowell 15 in. for mini fridge fermentation control of plastic 6 gallon bucket.
Sean M on Oct 20, 2021
Fermentation Temp control
Charles O on Sep 25, 2021
Seems like a good price
James K on Sep 18, 2021
To control the FermWrap Fermentation Heater for beers fermented with Kveik and to control fridge temp when fermenting with lager yeast.
James D on Sep 8, 2021
Have 1 need another
Chris S on Sep 3, 2021
Starting Temperature Controlled Fermentation
John M on Aug 7, 2021
friend has one.
Ronald N R on Jul 31, 2021
Price/More Beer reputation
Jim M on Jul 30, 2021
This is a highly recommended refrigerator controller for cheese storage
Valued C on Jul 12, 2021
for snake tank
Chester R R on Jun 30, 2021
I need temp control for a keezer, and this gives me the option to add heat in the winter.
Colin D on Jun 29, 2021
to replace my broken ranco
Patrick G on Jun 22, 2021
Temp control for cold stab
Ralph J on Jun 7, 2021
Good price and what I need.
David De P on Apr 28, 2021
i have a friend who recomended this controller, he said that he tried other brands but that this was the best one so far. I am hatching chicken aggs and need the temperature to remain the same .
anthony w on Apr 9, 2021
making a 2nd fermentation chamber
Paul S on Apr 6, 2021
To control fermentation temperature
Shawn L on Mar 18, 2021
I have a couple and find that they are quite reliable.
Jarle L on Mar 11, 2021
it's simply the best controller out there, robust sturdy, doesn't break that easily
Heinz Georg Hiller C on Jan 27, 2021
KD on Jan 20, 2021
To make the best fermented beverages i can
Donald W H on Jan 15, 2021
It's what I'm looking for to control a small space heater.
JACK N. on Jan 13, 2021
Valued C on Jan 6, 2021
brother told me it was good
Fox, Tyler J on Dec 31, 2020
To control temperature in my fermentation chamber
Mike B on Dec 17, 2020
was the deal of the day
Kevin Rodriguez on Jan 20, 2023
Economical temp control unit.
John W on Dec 13, 2022
Brewing friends, I just purchased the Inkbird ITC-308, and I'm using it to control the temperature of a ~7cf chest freezer. I've heard that excessively cycling a compressor on and off can shorten it's life. Does anyone have recommendations for the "Cooling Differential Value" and "Compressor Delay" that will give "good enough" temperature stability for fermentation, but won't wear-out the compressor too quickly?
Robert Garton on Sep 30, 2019
BEST ANSWER: I've left the Delay alone for my 4 models, but I've set the Differential down to 2ºF with no issue. (been using them for 3 years)
How does this work on a Kezzer?
Donald Palmer on Feb 21, 2019
BEST ANSWER: Very simple. You plug the keezer into the Inkbird controller, then plug the Inkbird into the wall outlet. the allows a freezer to cycle on and off in order to maintain warmer temps than a standard freezer can do on it's own. We use this controller on a mini fridge we converted into a fermenting chamber as well as a huge 14 tap keezer we built. keep perfect temps.
Can the temperature probe be submerged? I don't have a thermowell on this vessel yet.
Brian Sallee on Feb 20, 2021
BEST ANSWER: No, it can’t be submerged. You can fasten it on the outside of your fermentor using tape and a cloth to insulate it from the open air. This is surprisingly accurate. I’ve found it to be within 1-2 degrees of the wort/must. These are great devices though! Buying my second soon.
can you use this for a full sized standing freezer?
Matt Mcdonald on May 1, 2023
BEST ANSWER: I’ve used it for a full-sized refrigerator, and have seen it used for chest freezers as well. It’s rated output is 10A, so as long as the freezer doesn’t exceed that you should be good.
What is the input voltage range for this device?
Freeman Wells on Aug 7, 2020
BEST ANSWER: 110-120v
Our controller wont hold settings. It keeps going back to defaults. Very frustrating. Any thoughts ?
wilco landzaat on Mar 23, 2019
BEST ANSWER: You probably aren't holding the "set" button down long enough after setting your preferred temp. Here's the relevant note from the user docs...
" SET key: press SET key for 3 seconds to enter menu for function setting. During the setting process, press SET key for 3 seconds to quit and save setting change." This has worked for me. If you release the button too early, it reverts to the previously stored setting.

4.8 / 5.0
64 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 3 out of 5
high temp shutoff?
First use with beer after "testing" with water. Had set high temp cuttoff at 68F with +- set at 1F. Woke up to fermentation temp of 75F (no longer heating anyway) Air temp in room never got above 70F. Will have to see where it stabilizes today but a little dissapointed so far.
December 10, 2023
1 year ago
Rated 4 out of 5
Plug and Play
I like the idea of having heating and cooling in 1 unit. I still need to check the accuracy of this, since it appears to be a different reading than my Thermapen Mk4
April 9, 2023
1 year ago
Rated 5 out of 5
Working great
used with small fridge to control carboy temp
March 9, 2023
1 year ago
Rated 5 out of 5
Great device
Works as advertised. Very easy to use.
February 4, 2023
1 year ago
Rated 5 out of 5
Perfect for controlling temps in my fermentation chamber
January 5, 2023
1 year ago
Rated 5 out of 5
Must have
It's all about temp control and this is perfect
December 15, 2022
1 year ago
Rated 5 out of 5
Great temp controller
So far i really like this controller. Has a plug for a heater and a cooler. It’s winter in CO right now so we’re only using the heater plug. Works perfectly with our new bung, thermowell, and heater. We have a much better control of our fermentation temperature. Would purchase again. Very easy to use and set up with good instructions.
December 7, 2022
1 year ago
Rated 5 out of 5
Works great with my new fermwrap. Very easy setup.
May 16, 2022
over 2 years ago
Rated 5 out of 5
Temp controller
Works great, Instructions could be better but youtube has videos on it.
January 28, 2022
over 2 years ago
Rated 5 out of 5
Tricky to setup, but no hassle after
A little confusing to get set up, but the instructions help greatly. Been using this for a couple years to control a chest freezer for storage or fermentation. Does the job great.
December 27, 2021
over 4 years ago