A&M Sugarworks Store › Maple Syrup Hydrometer 45/75% Image 1 of 3 Image 2 of 3 Image 3 of 3 Maple Syrup Hydrometer 45/75% $24.75 Hydrometer for measuring the BRIX of your cooking syrup. Quantity: Add To Cart Added! Hydrometer for measuring the BRIX of your cooking syrup.