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.
Item # MT140
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 3 LBS
Community Q&A

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Browse 3 questions Browse 3 questions and 9 answers
Why did you choose this?
MoreFlavor Store
Simple and accurate
Dan R on Aug 25, 2022
appears popular/good reviews & price point
Nils N on Apr 11, 2022
Simple and accurate
Dan R on Aug 25, 2022
Just starting the hobby and this seams to be a good starting point
Robert W on Jul 20, 2022
appears popular/good reviews & price point
Nils N on Apr 11, 2022
price and simplicity
Lindsay T on Apr 6, 2022
Good reliable measurements
Chris on Jan 22, 2022
I wanted an economical and accurate way to track free so2
Jared R on Jan 22, 2022
Starting wine making and need to know SO2 levels
Kurt S on Nov 18, 2021
Xmas gift for my winemaker husband!
LINDA C on Nov 3, 2021
Home winemaker and it's affordable
Stephen H on Oct 21, 2021
Tom n on Apr 1, 2021
Paul R M on Jan 6, 2021
reports on accuracy for sulfite
Daniel S on Nov 3, 2020
Pricing, reviews.
DB on Oct 10, 2020
to help manage sulfite levels in wine
Michael G on Oct 8, 2020
GREG Y on Oct 6, 2020
highly recommended
Laurence F on Oct 3, 2020
Economical and uses well established chemistry.
Matthew F on Sep 11, 2020
Bruce M on Jul 10, 2020
I made honey wine, and it started to sour over time because of oxidation, and this will help me dose k sulfite to prevent it from happening to more of my brews
Hogan D on Jun 10, 2020
Valued C on May 2, 2020
Recommend by the home winemaking channel in youtube
John R on Feb 12, 2020
accuracy and value
Jeff Fowler on Nov 2, 2019
Need to know if the cider will be protected and there is correct amount of SO 2
Jennifer Lee S on Oct 16, 2019
joseph g 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 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
Car enthusiast 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
Just starting the hobby and this seams to be a good starting point
Robert W on Jul 20, 2022
price and simplicity
Lindsay T on Apr 6, 2022
I am having a color change problem as stated by another reviewer. When i add the SO2 indicator to the hydrogen peroxide, I get a bright pink. When I add the 40mL of distilled water it get pale pink. As per the instructions i add NaOH and can only get a very faded grey tinted water. I tried 3 times, wasting reagents. I decided to run the test anyway on the grayish solution. Nothing happened at all to the color. I dis-guarded the solution. I ran a titret test on another sample of the same white wine and it displayed 23ppm free SO2. Therefore i know I should have seem some color change on the original test. What am i doing wrong, or is my hydrogen peroxide (that i just got with the kit) bad?
Patti Dittman on Jan 21, 2021
BEST ANSWER: Use this kit regularly. I have found that 3% hydrogen peroxide can be purchased from a regular pharmacy or drug store. It is slightly acidic, thus the pink color at the start. Yes, I have to add NaOH to make it neutral (until the pink turns gray). If you can't turn it neutral then either your hydrogen peroxide has become contaminated (this can happen easily if you place the dropper/pipette you used from the acid into the hydrogen peroxide). But if you can get the hydrogen peroxide to neutral by adding NaON but you follow the rest of the instructions and don't get a color change it may be (1) you have no free S02 in your wine or (2) you don't have a good seal on the stoppers, or (3) the glass pipette is pressed down into the glass to far so the gas is not moving from the first to second.
Can I use a pH meter instead SO2 indicator? If yes, please tell me the exact pH for the start and end point of the Aeration-Oxidation process corespondent with the SO2 indicator changing color point.
Ivo Markov on Jan 8, 2024
BEST ANSWER: Yes, pH should go from about 3 to above 7
Can I use, for the Aueration-Oxidation Free SO2 process, commercial 3% Hydrogen Peroxide for hair dyeing or from a local pharmacy, instead of laboratory Hydrogen Peroxide?
Ivo Markov on Jan 8, 2024

3.9 / 5.0
14 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 1 out of 5
Material substitution problems
They have subbed out the beige stoppers for black ones of a much firmer material. They don't accept the glass tubes and barely can be squeezed into the beakers. My glass broke trying and cut my hand.
January 18, 2024
Rated 2 out of 5
Could use better instructions, cautions, and labels
Kit's good, reasonable instructions (they could have been clearer but YouTube to the rescue, and they mention they have a video only at the very end of the instructions). My much bigger complaint was that the phosphoric acid leaked during shipping. It's happily not a higher strength, it got on my hands and it's only at the end of the instructions that it says to immediately go put baking soda on it, so minus 2 stars for packaging and poor placement of the caution statement. Also the smaller reagent bottles should have labels so the hydrochloric and phosphoric acids don't get mixed up.
December 27, 2022
1 year ago
Rated 4 out of 5
Great kit for the chem lab inclined.
Dead on accurate way to measure free sulfite. Set up instructions could benefit from better diagrams.
September 7, 2022
1 year ago
Rated 5 out of 5
Works great with the provided directions.
June 2, 2021
over 3 years ago
Rated 4 out of 5
I am glad I bought it, but I wish there were less expensive burretts.
The instructions are excellent, and endpoint color changes are obvious. My biggest frustration is due to tippiness of the flasks once the tubing is attached. I need to build a tubing support or a base to stabilize the flasks. I wish there was a TA test that was as easy to read.
March 3, 2021
over 3 years ago
Rated 4 out of 5
The instructions were a little confusing. However, over all I am pleased with the product.
January 13, 2021
over 3 years ago
Rated 5 out of 5
A great addition to my winemaking equipment
My only previous experience with a lab test like this was over 50 years ago in high school. However, I found the instructions with this kit to be clearly written and easy to understand. Assembling the parts of the apparatus was no problem and I added a simple platform to help hold the vessels. Manipulating the pipettes requires some practice. As an alternative I have acquired a couple of 10mL medicine droppers and keep one for acids, one for bases. Was able to get some more Phosphoric Acid 25% locally, have been doing practice runs and can now produce consistent results. Would definitely recommend this for any home winemaker ready to up their game!
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November 2, 2020
over 3 years ago
Rated 5 out of 5
Easier than I thought it would be
My brother is a chemist and helped me with procedures. He had no complaints with the kit, he appreciated the simplicity of it.
Since it is billed as an entry-level economy kit, it would probably be helpful to assume the customer has limited lab experience and generic lab procedure guidelines would be helpful. Do not pour water into acids, rinse with distilled water and air dry, etc..
August 12, 2020
over 3 years ago
Rated 5 out of 5
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
over 5 years ago
Rated 5 out of 5
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
over 6 years ago