Economy Aeration-Oxidation Free SO2 Test Kit

Economy Aeration-Oxidation Free SO2 Test Kit

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Finally - Accurate & Affordable Free SO2 Testing!

In winemaking, Sulfur Dioxide (SO2) is one of the most important and effective tools in the winemaker's arsenal for protecting against the effects of oxidative or microbial spoilage. Unfortunately, over time any SO2 added to a wine will be consumed due to its interaction with the very things that it is protecting the wine from. The ability to accurately monitor the amount of SO2 remaining available in a wine to protect it - termed Free SO2 - is hugely important when it comes to ensuring that the wine makes it through the aging process safely.

For years MoreWine! has offered a variety of methods for testing the level of Free SO2 in a wine. Until now, winemakers had to make a choice between inexpensive test kits which lacked accuracy and kits which are highly accurate but cost hundreds of dollars. Now MoreWine! has developed an inexpensive AND accurate test kit which we feel has a place in every home winery.

Based on the exact same science as our original Aeration-Oxidation test kit, our new Economy Aeration-Oxidation kit offers a high degree of accuracy for a fraction of the price. Aeration-Oxidation is the exact same testing method used in thousands of commercial wineries and wine analysis laboratories around the world. It is time-tested and proven accurate and is simple to perform. Our kit includes:

  • All the glassware and tubing needed to set up a 2-chamber test apparatus
  • Pipettes to accurately measure your wine sample and chemicals
  • An aspiration pump to drive the chemical reaction in the test method
  • Enough chemical reagents to run 2-3 tests
  • Clear and comprehensive instructions for setting up and running the system

PLEASE NOTE: This kit ships with a small bottle of 25% phosphoric acid which is required for the test. At this strength phosphoric acid is considered a hazardous material and we are not certified to ship larger quantities. We recommend that you investigate the possibility of sourcing it locally, through a laboratory supply company. If this is not possible, you can purchase it through us; see part #s MT108DS & MT108BDS. The high cost of these bottles reflects the $20 surcharge which FedEx adds to handle a hazardous shipment. These bottles ship directly from our supplier's warehouse and will take a couple of extra days to arrive.

Click here to download a copy of our instruction manual for this kit.

Shipping Restricted: This product is only eligible for ground shipment within the contiguous 48 states.
California Recipients: See Proposition 65 Information
Item # MT140
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 3LBS
Community Q&A

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Why did you choose this?
MoreFlavor Store
Joseph gallia s on Aug 28, 2019
making enough wine to allow aging, knowing the SO2 will allow aging safely.
Scott DeYoung D on May 24, 2019
Joseph gallia s on Aug 28, 2019
Easier than assembling the parts individually.
Stan S on Jul 23, 2019
making enough wine to allow aging, knowing the SO2 will allow aging safely.
Scott DeYoung D on May 24, 2019
Understanding the need for an accurate kit, it’s the right price
Jason H on May 3, 2019
Recommended by a friend, purported accuracy reviews were very positive.
Melissa M on Feb 12, 2019
Price and to be able to check SO2 levels
Eric R on Jan 15, 2019
To measure free S02's in my meads
Ron S on Dec 14, 2018
James H on Nov 26, 2018
I am starting a cidery
Michael B on Oct 7, 2018
To compare the results of my aeration oxidation apparatus
Mike B on Sep 15, 2018
First attempt at this price was right
David T on Mar 30, 2018
Easier than assembling the parts individually.
Stan S on Jul 23, 2019
Understanding the need for an accurate kit, it’s the right price
Jason H on May 3, 2019

4.1 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
This is affordable and provides accurate results. I enjoyed putting the system together and running the tests. We have a merlot and a Pinot noir in two fermenters.
December 24, 2018
10 months ago
SO2 Tester
I have used this kit a few times now and I can really see a difference in my wine I make now versus the wines I made without doing any SO2 testing.
December 15, 2018
1 year ago
Very good kit with good instructions
Very please with purchase. Very accurate. Just a little time consuming to perform but it is a simple test to perform
January 13, 2018
1 year ago
the reagents must be wrong
I will start out with the fact that I have a Ph.D. in biochemistry and have published over 100 peer reviewed scientific papers. I run a research lab that has been funded for over 25 years. Clearly, I know how to do simple titrations such as required for this kit. I used the entire bottle of HCl and could not get the indicator reagent to change color. I cannot recommend wasting money on this kit if they do not have the quality control to ship reagents that are the required concentrations.
March 4, 2017
should have gotten this long ago
After years trying to use Titrets with red wine, this is night and day better. I would say its accurate to about 5ppm.

While the procedure is fairly complex, the videos and docs are very good. Pick up a second 10ml pipette if you get this kit- honestly it should have come with 2- so you don't cross contaminate your reagents.

January 23, 2016
Works well, takes time, but very accurate.
Very appropropiate for certain wine-makers. It helps to test several wines at the same time. I've had this A/O tester for about two years, but recently refined my technique. Now I use a buret for TA titrations, and it is an advantage with the A/O test too, but not a necessity.

I recently tested this equipment for accuracy. As a standard, I mixed a fresh solution of 50ppm k-meta and distilled water. Then I ran the A/O test on it. The result was 49ppm, probably better than my margin of error for mixing the k-meta. Bottom line, this kit is very accurate when used properly.

It takes a little time to develop the proper technique, so be prepared for that. In addition to the basic kit, I have a buret and stand, and I standardize my NaOH titrate. You can get along quite nicely w/o this though and still get close results.
August 29, 2014
SO2 Test kit, MT 140
Very accurate test for S02 levels. A little tough assembling the glass tubing through the Rubber stops, but if you add a little Vaseline, and dilate the holes larger, by using a metal object close to the same diameter as the glass tubing, the glass tubing goes in fairly easily.

The chemistry is fun to do, and follow the steps of video.

Phil Barone (The Merlot Guy)
October 20, 2013