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A handheld optical refractometer for measuring brix in grape juice on a wooden workbench
Testing

Handheld Optical Refractometer

Read sugar from a single drop of juice. Way easier than the hydrometer for must.

Russ-approvedBest for big batchesBuy once

≈ $28–$35price range

A drop of juice on the prism, hold it up to the light, read the brix. Perfect for fresh-juice batches when you want to know your starting sugar before pitching yeast.

Doesn't replace the hydrometer once fermentation is underway (alcohol throws the reading off). It complements it.

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.

Why we like it

Tests starting sugar in 10 seconds with no test-jar setup.

Who it's for

Anyone working with fresh juice, fruit, or anything not in a kit.

What's in the box

  • 0–32 brix range
  • Auto-temperature compensation
  • Single-drop sample
  • Includes calibration screwdriver

Goes well with