Paul Hoover, Owner/Winemaker
Still Waters Vineyards

Winery Equipment Testimonial:

"Upgrading your winery from 1000 cases per year to 3000 to 5000 can be a daunting task. The choices in winery equipment, capacity and price vary all over the place.  The great thing about Ryan is, having been a wine maker for years, he knows how to design things from start to finish. When I harvested my first ten tons of the year at 6:30 a.m., Ryan and his staff were there making sure everything was working correctly. I knew I had made a good decision."

Home > Winery Lab Supplies > Milwaukee Instruments > Mini-Titrator SO2 Mi455

MiniTitrator SO2 Mi455

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Mini-Titrator SO2 Mi455
For Determination of Free & Total Sulphur Dioxide in Wine


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Milwaukee Mini Titrator So2

Mi455 is a user-friendly microprocessor-based mini-titrator for the determination of free and total sulfur dioxide in the process of wine making. This mini-titrator will give you direct readings with a range of 0 to 400 ppm.  The instrument comes with a pre-programmed analysis method for the free and total sulfur dioxide measurements on a wine sample.

Technically, sulfite is a salt or ester of sulfurous acid, but more common, sulfur dioxide. Sulfite is the most effective and widely used preservative in wine making. It preserves by safe guarding musts and wines against premature oxidation and microscopic life forms that could otherwise spoil wine. It preserves a wine's freshness, helps maintain its color, and is essential for aging wines beyond their first year without deterioration. It also inhibits wild yeast, thereby allowing cultured wine yeasts to dominate the fermentation. Sulfites may be "bound" or "free".  Bound SO2 combines with aldehyde compounds, those responsible for oxidation in wines.

Free So2 results from the dissipation of active So2 and is the only So2 that provides antiseptic and oxidative protection to wines. The most efficient way to add free So2 to a must, juice, or wine is by adding dissolved potassium metabisulfite to it.  The effectiveness of free So2 is dependent on the pH of the media to which it is added.


Range 0 to 400 ppm of SO2
Resolution 1 ppm
Accuracy 5% of reading
Method ripper titrimetric method
Principal equivalence point redox titration
Sample Volume 50 mL
ORP Electrode MA924B/1 (included)
Pump Volume 0.5 mL/min
Stirring Speed 1500 rpm
Environment 0 to 50°C; max RH 95%
Power Supply 220v/50Hz; 10va
Dimensions 208 x 214 x 163 mm
Weight 2.2 kg

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