The VST LAB Coffee III refractometer is used for measuring coffee & espresso TDS. The advanced fourth-generation handheld instrument provides laboratory precision in the palm of your hand.  Accuracy and precision of the VST Lab coffee refractometers are comparable to state-of-the-art dehydration ovens, and rival benchtop laboratory refractometers with Peltier trays.  VST's latest Lab III refractometer has a typical accuracy of +/- 0.02% and worst case precision of +/- 0.1%. 

Designed for the rapid and accurate determination of coffee concentration, these instruments will automatically correct for temperature within the range of 15-40 degrees celcius.  When used and cared for properly, the refractometer will provide years of trouble-free service.

This unit comes with the software. 

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