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Quantity
1
Description
R2 Extract is a modern digital refractometer designed to measure Total Dissolved Solids (TDS) or the concentration of brewed coffee. Use R2 Extract with CoffeeOS in combination with Microbalance to track brews and record them on the Brew Co...
Reviews
4.6
37 ratings
5
4
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2
1
It took awhile to get it into my process. I am not sure about absolute accuracy, but it helps to see the effects of adjustments and trends.
K
Kirk · June 13, 2026
An egotistic eco-system presented with pomposity to inflate reality.
M
MR · July 14, 2026
works great, holds calibration and gives me an idea where to go when things taste off.