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 - Out Of Stock
Weight 1 LBS
Community Q&A

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Why did you choose this?
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Fermentation Temp control
Charles O on Sep 25, 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
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
Dawn M 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
Kurt D 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
Need it
Daniel Franco SFI006 on Dec 2, 2020
I have another brand and an Inkbird that is much more robust and eisier to use.
Jack G on Nov 25, 2020
necessity for replacing old one
GrdgG. on Nov 19, 2020
Its a must have in brewing.
Kevin T on Oct 27, 2020
It came recommended by friends who already use it.
John L on Oct 24, 2020
Simple, economical temp controller.
Matt Bahm on Oct 24, 2020
Edward H on Oct 15, 2020
For future temperature control of fermentation chamber.
Jason T B on Sep 3, 2020
Old temp controller failed and froze my beer
nicholas r on Aug 26, 2020
online reviews
Charles J on Aug 11, 2020
To use with Electric Bucket Heating Element - 1000 Watt Heat Stick
Eric Pavey on Jul 13, 2020
Analog Kegerator temp control drifts way too far. And for future fermentation use.
Jeffrey V on Jul 4, 2020
more flexible for year-around temp control in garage
Ronald E on Jun 17, 2020
Need a third one
Stuart R on Jun 17, 2020
Good luck with one for keezer. This is for a ferm chamber
Andy Murrin on Jun 16, 2020
Recommended by friend.
John H on Jun 13, 2020
many positive customer review and online recommentation
Joshua N on Jun 11, 2020
I needed one and this is affordable.
Mark on May 29, 2020
Son recommended
Gerald B on May 29, 2020
Control fermentation temperatures
Jeremy L on May 22, 2020
Recommended by Reddit r/homebrew
William E on May 22, 2020
Pete T on May 16, 2020
Temp controller
T on May 12, 2020
Backup in case current one fails
Michael S on May 2, 2020
to control my cooling in a hot climate
casey w on May 2, 2020
For beer
Valued C on May 1, 2020
Seems like a good price
James K on Sep 18, 2021
Have 1 need another
Dawn M S on Sep 3, 2021
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: Rubber band the thermo couple to a plastic bottle filled with water. The bottle changes at a more constant rate than the ambient air.
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.
What is the input voltage range for this device?
Freeman Wells on Aug 7, 2020
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.

4.9 / 5.0
53 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Fermenting Fridge
Plugged my fridge into it and set it to 65°. Stays within 4° + or -
September 10, 2021
1 month ago
Rated 5 out of 5
Set it up, works great!
August 12, 2021
2 months ago
Rated 5 out of 5
Inkbird 308 Cheese Cave Controller
Plugged it in, turned it on, programmed it to 55 F and it works great! The cost is very affordable, it is a digital (rather than analog) controller, what more could you want? The instruction sheet could be improved though
August 3, 2021
3 months ago
Rated 5 out of 5
Inkbird for Cold Stabilization of Wine
Using this to turn a freezer into a cold stabilization chamber for wine. It is working great ?? ??
July 9, 2021
4 months ago
Rated 5 out of 5
Plug and Chill
This is my second digital temp control. I use it to maintain kegerator temperature!! Easy to setup and use effectively!
June 13, 2021
4 months ago
Rated 4 out of 5
works good had a hard time setting up but not the sharpest knife in the drawer
May 4, 2021
6 months ago
Rated 5 out of 5
Good Product
Using it for temp control in a small greenhouse. I wish it had independent target settings for heat and cooling. But my heater has it's own thermostat, so that's the work around for heat.
The control works well for kicking on the fan and heater.
March 17, 2021
7 months ago
Rated 5 out of 5
Inkbird Temp controller
By far the best and easiest to use temp controller. Period.
February 19, 2021
8 months ago
Rated 5 out of 5
Temp Controller
This is a very easy controller to use and I really like that the numbers are larger and easy to read. Have been using for about a month and so far it works great. Would buy again for sure.
February 19, 2021
7 months ago
Rated 5 out of 5
Works great.
Unit does as advertised. Seems to be working perfectly. Nice readable display. Would highly recommend.
February 3, 2021
9 months ago