This solution is used to establish a correction factor for Hanna Refractometer that will allow you to improbe the reading's precision and correct a systematic altered data provided by a mesauring instrument like a refractometer. This solution can be used with an Hydrometer or a Densimeter. It provides a known density liquid that you can compare with the reading you get from your instrument, and then establish the adjustment you must add to the subsequent readings to be on point. Calibration must be done in a 20°C environment. For a precisely dense maple syrup.