Consistent, accurate measurement of maple syrup density is a challenge for many maple syrup producers. In maple sap and maple syrup, Brix may be determined using either density (hydrometer or hydrotherm) or refractometry (optical or digital refractometer). This is a guide to determining density of maple syrup.
View resource → http://www.omafra.gov.on.ca/english/food/inspection/maple/mple-guidance-S1-1-4.htm