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Blichmann ThruMometer™ Thermometer - 3/8" Tube


SKU# 7512

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In-line thermometer for measuring the temperature of your wort outflow from a counterflow chiller.


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  • ThruMometer™ 3/8" In-line Thermometer from Blichmann Engineering™
  • ThruMometer™ 3/8" In-line Thermometer from Blichmann Engineering™
Product Details

The Thrumometer is an in-line thermometer, ideal for measuring the temperature of your wort outflow from a counterflow chiller. The interior of this thermometer is mirror smooth, providing no places for bacteria to hide. This thermometer responds very quickly (1°F per second), has 1°F precision, and 0.5°F accuracy. It never needs calibrating. If you use a highly-efficient counterflow wort chiller, the Thrumometer will help you avoid over-chilling your wort, and will save water. This instrument is made from a head-treated highly corrosion-resistant aluminum alloy that will last a lifetime! Requires 3/8" ID tubing. Should not be used with liquids exceeding 140°F.

Additional Information
Support Documents:No
4.5 / 5.0
13 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
A good product
I bought the Thrumometer with a Schirron Plate Chiller and some hose and the Thrumometer allowed me to monitor the wort temperature easily. It was a simple matter to make one adjustment to the water flow rate to maintain a 64 degree outflow. My 5 gallons of boiled wort took 7-1/2 minutes to chill completely by gravity feed.
November 12, 2015
A Real Brew Day Helper
Consider this nice toy almost a must for use with my Grainfather. The counterflow wort chiller on that thing works so fast that it's easy to get the wort too cool, and it happens in the blink of an eye. I hook up the ThruMometer on the cool side out as soon as I get the water flowing, and as soon as it registers 80 F, I start to flow into the fermenter. Sweet!
February 1, 2017
9 months ago
Great way to dial in your chiller flow.
I like this because I can adjust my valve settings to get the wort flow through my chiller as fast as possible, chilling down to pitching tempratures.I also clean and sanitize while still plumbed to my pump and Therminator.
November 10, 2010
Much easier this way!
I simply plumb this in stream after the chiller, and it makes keeping track of the wort temp much easier than holding a thermometer in the stream. I sterilize with it connected to the hose and never had a problem with the sticker. Maybe i havent left it in long enough to hurt it yet... Works great!
July 19, 2010
Great product
Works as advertised. Simple to use and simple to clean.
July 20, 2011
Works great for me, have it at the end of my counterflow chiller going into the carboy, gives me accurate readings!!
October 27, 2012
Works great
Works great
November 6, 2015
Works well, but...
First of all, it works fine and each of my gripes are clearly printed in the description. I'd urge you to consider them before you make your purchase though, as they might not set-in until you go to use the device if your processes are similar to mine.The unit shouldnt' be used above 140F. No big deal right, you're using it with cooled wort.. Well, I guess that depends - I like to sanitize my final loop from the kettle, through the plate chilller, then the hose to the carboy by pumping boiling wort through it for a while towards the end of the boil and back into itself. I can't do that with this attached, and subsequently negate some of my efforts when I have to add it after the fact. It's also silly that it's not 1/2". My blichman plate chiller fitting set is all 1/2 barb, so you end up having to step-down or buy another barb for this guy. I might try to stretch some hot silicone tubing over the 1/2" in the future to see if that doesn't make it useable.Anyway, it is a great little item - just a couple of irritants that have rendered it a paperweight as my setup has gotten more advanced.
August 9, 2014
For over two years, has worked great
I attach it in-line with my boil pot out spigot hose, to get an accurate final reading of wort temperature as it hits the primary fermenter, and it works great. One small note -- the thermometer is really just an aquarium-type liquid crystal strip attached with high strength clear tape. Not shabby or low-quality by any means, but one day I left it sitting in some B-Brite too long, and it did bubble the tape up. Still seems to work fine, but if your going to clean it by dunking it in sanitizer like I do, defiantly don't keep it there longer than a minute or two.
February 27, 2010
This works fantastically well, yet not when I am trying to knock out lagers at 50F. It would have been a much better instrument if the range was 78F-48F. I've ended up rigging a ss dial thermometer with a 1/2"mpt ss T after my therminator instead.
February 26, 2012
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Browse 4 questions Browse 4 questions and 9 answers
Why the 140 degree temperature limit? Some of the convenience is negated by having to swap it out when sterilizing your counter-flow chiller with boiling wort.
Larry Q on Apr 17, 2017
BEST ANSWER: It'll probably damage the film. I'm not a big fan of this unit because there's quite a delay in readouts when making adjustments. Use an inline dial or digi thermo or go by touch. You'll know what 68 degrees feels like.
I'm seeing there is a limit to the temperature in Q&A. I'd like to use something like this as a temp gauge for when I'm using my HERMS system and want a reading right from the HERMS coil going back into my Mash Tun. Can anyone assist me with something similar that has the capabilities of going above 140'F?
Austin W on Jul 26, 2017
BEST ANSWER: I suggest getting a stainless T connection with 1/2" NPT female connections, a thermowell with 1/2" NPT male connection, and a thermometer like below. You may need to add some length to the one end with the thermowell to make it long enough. You may need a dual male 1/2" NPT and a dual female in order for the thermowell to fit (see below). I did this, but use electronic one-wire thermometer to a Raspberry Pi. You will have to search the web for the thermowell but can be found at. The stainless T can be found on Amazon. Hope this helps.
Full Thread Nipple 1/2
Full Thread Nipple 1/2" Stainless
Nipple Stainless 1/2
Nipple Stainless 1/2", 1.5" long
MegaPot Dial Thermometer
MegaPot Dial Thermometer
What are the factors that determine whether I should purchase the 3/8" or the 1/2" Thrumometer. Obviously 1/2" moves more wort but is more better in this instance? I don't own a pump yet but I will eventually, if that matters. The 1/2" version is presently unavailable. Is it no longer in production or is it just the most popular of the two and therefore out of stock?
S T on Sep 5, 2016
BEST ANSWER: I used a 3/8th inch copper tube running through a garden hose to make a counter-flow wort chiller. I have the Thrumometer at the end of the copper coil. Since it was all 3/8 inch, I got a 3/8 inch Thrumometer. I do use a pump, but I think it would flow fine without one. I even restrict some of the flow out of the pump so it all chills nicely. If too fast, it may not chill enough.
Can I purchase the 1/2in that's in the photo?
T H on Nov 7, 2015

The product number for the 1/2" thurmometer is 40878


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