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A Vinmetrica SC-300 SO2 sulfite analyzer device with electrode and sample beaker on a wooden workbench
Testing

Vinmetrica SC-300 SO2 Analyzer

The serious instrument for serious aging. Tells you free SO2 in 60 seconds.

Russ-approvedBest for big batchesEditor's choiceBuy once

≈ $269–$289price range

Sulfite (SO2) keeps wine from oxidizing during long aging. Too little and it browns; too much and it tastes harsh. The Vinmetrica analyzer measures free SO2 directly so you stop guessing about K-meta additions.

Expensive. Overkill for kit-only winemakers. Borderline necessary if you're aging premium reds for a year or more.

Where to buy

We don't sell this — these links go to retailers who do. We may earn a small commission at no extra cost to you.

AmazonPrimary pick$269MoreWine$289Vinmetrica direct$279

Why we like it

Russ owns one. Russ has feelings about it. The wine in his cellar is better for it.

Who it's for

Anyone making premium kits, fresh-juice batches, or anything aging beyond 6 months.

What's in the box

  • Measures free SO2 in ppm
  • Includes electrode + reagents
  • Battery powered
  • Calibration solutions sold separately

Goes well with

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A 6-gallon plastic pail of fresh red grape juice on a wooden floor
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