Shopping Cart

Your cart is empty.

Your cart is empty.

Learn To Brew cbtw Stopper Thermowell

Free shipping on orders over $29.99

$19.49

$ 9 .99 $9.99

In Stock

About this item

  • Stopper thermowell
  • Fits carboys
  • Stainless steel
  • Works with Johnson controls


This carboy thermowell is used in conjunction with the digital thermostat to more accurately regulate internal temperature during fermentation. It is exceptionally useful during the start of fermentation when the lag between ambient temperature in the refrigerator and actual temperature in the carboy can vary greatly. Now you can keep your beer or wine within one degree of the set point on your digital controller. Designed to fit either the 5, 6 or 6.5 gallon glass carboys, or any other similarly sized opening hole, the unit comes with an 15' stainless steel thermowell and a 6.5 stopper. It can be used in any container with a stopper opening where you need to accurately monitor and control liquid temperature. You can use this with your refrigerator for exact cooling temps, or use it with one of our heating products to control how warm your fermenter gets.


Alvarez Fam
Reviewed in the United States on July 13, 2021
This is silicon and not Rubber as shown in the picture. As I was cleaning and sanitizing, is split right off. Not even 10 minutes after opening the package. They need to let people know this is NOT Rubber in the product description. It also does not fit as well as the rubber stoppers it feels like this wants to slide out and not stay put.
Alvarez Fam
Reviewed in the United States on July 13, 2021
This is silicon and not Rubber as shown in the picture. As I was cleaning and sanitizing, is split right off. Not even 10 minutes after opening the package. They need to let people know this is NOT Rubber in the product description. It also does not fit as well as the rubber stoppers it feels like this wants to slide out and not stay put.
Lisa Abke
Reviewed in the United States on March 2, 2019
Works perfectly. I have ordered two of these now that I know just how well rhe fisrt one worked. No gases have escaped other than where it is suppose to.
Lisa Abke
Reviewed in the United States on March 2, 2019
Works perfectly. I have ordered two of these now that I know just how well rhe fisrt one worked. No gases have escaped other than where it is suppose to.
Steven Ouzts
Reviewed in the United States on December 17, 2019
I wanted this thermowell because the stopper is shown to be rubber but the ones I received were silicone, which is prone to splitting. For example, after only a few uses my other silicone thermowells split from the airlock hole out to the edge of the stopper which can expose beer to oxygen. Also, it is too small to fit in my carboys.
Steven Ouzts
Reviewed in the United States on December 17, 2019
I wanted this thermowell because the stopper is shown to be rubber but the ones I received were silicone, which is prone to splitting. For example, after only a few uses my other silicone thermowells split from the airlock hole out to the edge of the stopper which can expose beer to oxygen. Also, it is too small to fit in my carboys.
Dadof5
Reviewed in the United States on August 27, 2017
Should have fit my 6gal glass carboy but didn't.
Dadof5
Reviewed in the United States on August 27, 2017
Should have fit my 6gal glass carboy but didn't.
Vinny Goombotz
Reviewed in the United States on July 17, 2017
Used this conjunction with the Inkbird Itc-308 Digital Temperature Controller. Works well and allows the controller's thermistor to accurately measure the wort temperature.
Vinny Goombotz
Reviewed in the United States on July 17, 2017
Used this conjunction with the Inkbird Itc-308 Digital Temperature Controller. Works well and allows the controller's thermistor to accurately measure the wort temperature.
Sean
Reviewed in the United States on June 20, 2017
Fits my 6-gallon carboys much better than the silicone version that would always slip and pop out. Plenty of give for both airlock and probe, easy to clean after. Stays snug during blow-off but not too difficult to remove. I will likely buy more.
Sean
Reviewed in the United States on June 20, 2017
Fits my 6-gallon carboys much better than the silicone version that would always slip and pop out. Plenty of give for both airlock and probe, easy to clean after. Stays snug during blow-off but not too difficult to remove. I will likely buy more.
James Dugan
Reviewed in the United States on March 22, 2016
Works exactly as you would expect and the price point is lower than some of the others I've bought. Fits all of my standard glass carboys.
James Dugan
Reviewed in the United States on March 22, 2016
Works exactly as you would expect and the price point is lower than some of the others I've bought. Fits all of my standard glass carboys.