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Maple Syrup Digital Grader

Hanna’s Maple Syrup Digital Grader bridges the gap between visual grading kits and professional instrumentation. Temporary maple syrup grading kits provide minimal accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a filter and a light sensing detector to precisely determine the percent light transmittance. Professional instrumentation offers greater resolution and accuracy but can cost hundreds of dollars. The HI759 Maple Syrup Digital Grader uses a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at an affordable price.

Compact, Portable Design
Calibrates 100% transmittance with glycerol reference
Simple, one-button operation

Product Description


Maple Syrup Digital Grader


Range 0 to 100% transmittance
Resolution 1% transmittance
Accuracy @ 25°C/77°F ±4% transmittance
Light Source LED @ 560 nm
Light Detector silicon photocell
Method adaptation of the USDA maple syrup standard
Environment 0 to 500C (32 to 1220F); RH max 95% non-condensing
Battery Type (1) 1.5V AAA
Auto-off after ten minutes of non-use
Dimensions 86.0 mm x 61.0 mm x 37.5 mm (3.4″ x 2.4″ x 1.5″)
Weight 64 g (2.25 oz.)
Ordering Information HI759 Checker® is supplied with (3) sample cuvettes with caps, sealed glycerol reference cuvette, (3) plastic beakers, battery, instructions, and quick start guide.


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