Digital coffee refractometer. This high-end hand-held digital refractometer is intended for all baristas, professionals in the field of preparing good coffee and espresso. Contains a scale to measure %TDS total dissolved solids.
You can pair this device with your smartphone via NFC and download the PAL Droid NFC app to save your results and use it even better.
The manufacturers recommend the user to take 3 consecutive measurements to ensure absolute accuracy.
A refractometer is a device for measuring the index of refraction. The principle of the refractometer is the index of refraction in the liquid, which is then projected onto the scale in the eyepiece as the interface between the unilluminated and illuminated surface, which determines the resulting value. In the case of a digital refractometer, you will see this value on the device's display.