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For the most part repeatable results. However the given accuracy is concerning because a difference of 0.15% TDS could be the difference between a result of 18% extraction to 22%.. Most reading of the same sample are within +/- 0.03. Still a fairly big difference when it comes to calculating coffee extraction. Overall fun and a cool reference, that's helped me brew better cups. Just wish I knew the accuracy was the same as the VST. I'd probably save up for the VST before I bought one of these again.
Verified purchase: Yes | Condition: New
After calibration with distilled water, the Atago refractometer was accurate within .02% (tested with VST calibration solution), and matched the accuracy of our VST refractometer. When following good sample measuring protocols (e.g. cooling samples before placing on the lens, and then waiting 1 minute to allow the liquid and lens temperature to equalise before reading the sample), the Atago is only a few seconds slower at processing a result, but it is as accurate as our VST refractometer. The Atago is less than half the price of the VST, so it is significantly better value. IMO, the only advantage with the VST refractometer is the ability to fully recalibrate if distilled water calibration does not correctly calibrate the device. However, I have owned an Atago PAL Coffee refractometer for over 3 years, and it is still as accurate as our VST refractometer, and distilled water recalibration continues to restore its accuracy.Read full review
Verified purchase: Yes | Condition: New
Works wonderfully. Takes espresso to the next level.
Verified purchase: Yes | Condition: New
Simply perfect! Consistent, precise measurement. No need to recalibrate for a long time. I love it. It looks like a toy, but I dont care...
Verified purchase: Yes | Condition: New
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