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Coffee refractometer
Similar to the ordinary refractometer, the coffee refractometer can be used to determine the amount of extraction and measure the concentration of caffeine in coffee.
It has appeared in some places, thanks in large part to VST, which is in charge of the first-ever coffee refractometer (they are now the fourth generation!) VST's refractometer is designed to measure certain elements of coffee, but it is based on the original technology of scientific instruments. VST's coffee refractometer uses proprietary software VST coffee tool, which makes the product easy to use and understand.
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