A measuring instrument that is very simple of use : simply place a small drop of your product on the prism lens, orientate to the light like a looking glass, and you'll instantly get a reading about the sugar density in your sample. Also appropriate to check the density of any other solution, this refractometer shows the concentration percentage of the soluble solids contents in total, whether it's salt, sugar, acids, proteins, etc. The value obtained in the measurement is the sum of all the soluble solids, meaning if you have a solution composed of other components, a conversion chart should be used. For a maple syrup production, the refractometer is calibrated based on a sugar cane concentration, so the reading you get don't need to be converted because it perfectly match maple syrup concentration.