Titrets Free SO2 Tester | Wine Sulfite Test Kit | Box of 10

Quick, Simple Free SO2 Testing for Home and Small-Scale Winemakers

Monitor sulfite levels in your wines with confidence using the Titrets Free SO2 Tester. This convenient, single-use test kit uses the industry-standard “Ripper” chemistry to give you fast, easy-to-read results in ppm free SO2, helping you protect your wine from oxidation and microbial spoilage.

What This Kit Does

• Measures free SO2: Designed specifically to measure free sulfur dioxide levels in wine, reported directly in ppm (mg/L).
• Ripper chemistry: Uses an iodide-iodate titrant in acid solution with a starch indicator, the same screening method widely used in wineries.
• Dry white wine friendly: Provides acceptable accuracy for dry white wines, with typical error up to about 10 ppm.

Best Uses & Important Limitations

• Recommended for: Dry white wines where you need a quick screening test to verify your target free SO2 level.
• Not recommended for: Red wines or white wines containing significant ascorbic acid or tannin, as these can cause falsely high readings.
• Use caution above 40 ppm: Any reading greater than about 40 ppm free SO2 should be considered suspect; confirm with an alternative sulfite test method if possible.

What’s Included

• Test vials: Box of 10 Titrets ampoules pre-dosed for free SO2 testing.
• Plastic tubes & accessories: Includes the plastic tubes/valve assemblies needed to perform each test.
• Compact packaging: Easy to store in your winery, cellar, or home winemaking space.

How the Titrets Free SO2 Tester Works

• Color-change endpoint: As you add small amounts of your wine sample into the ampoule, the solution shifts from deep blue to colorless (or the color of your sample) at the endpoint.
• Direct ppm reading: Once the color change occurs, hold the ampoule tip-up and read the printed scale at the liquid level to obtain free SO2 in ppm.
• Screening tool: Ideal for routine checks to ensure your sulfite additions are in the right range for wine stability.

Basic Testing Instructions (Summary)

• Step 1: Collect your wine sample in a clean container.
• Step 2: Push the valve assembly onto the Titret ampoule tip until it reaches the reference line.
• Step 3: Gently snap the ampoule tip at the score mark.
• Step 4: With the valve tip immersed in the sample, briefly squeeze the bead valve to draw a small amount of wine. The contents turn a deep blue. Wait 30 seconds and rock to mix.
• Step 5: Continue adding small amounts of sample, rocking to mix after each addition, until the blue color disappears and the liquid becomes colorless (or matches the wine’s color).
• Step 6: Stop the test and read the scale opposite the liquid level to determine free SO2 in ppm (mg/L).

Why Monitor Free SO2?

• Oxidation control: Proper free SO2 levels help guard against browning, loss of aroma, and stale flavors.
• Microbial stability: Keeping sulfite in the right range helps protect wine from unwanted yeast and bacteria.
• Better cellaring decisions: Regular testing lets you adjust sulfite additions accurately for bottling and long-term storage.

Who This Kit Is For

• Home winemakers: An easy, low-equipment way to start testing and dialing in your sulfite management.
• Small wineries & garages: A convenient backup or screening tool alongside more advanced lab testing.
• Wine educators & clubs: Great for teaching the basics of sulfite management and free SO2 testing in hands-on settings.