Glossary
A measurement scale indicating the dissolved sugar content of an aqueous solution, expressed as a percentage by weight. In beekeeping and honey production, Brix readings from a refractometer help beekeepers determine honey's sugar concentration and moisture content to assess ripeness and quality.
Brix is directly related to honey quality and shelf stability. A higher Brix reading means higher sugar concentration and lower moisture content. Properly ripened honey typically has a Brix value between 79.5 and 84, corresponding to a moisture content below 18.6 percent.
Moisture content is the most critical quality parameter for honey. Honey above 18.6 percent moisture (below about 79.5 Brix) is at risk of fermentation, where naturally present osmophilic yeasts can multiply and spoil the honey. This is why beekeepers wait to harvest until the bees have capped the honeycomb cells, indicating that the honey has been dried to the proper moisture level.
Beekeepers measure Brix using a handheld refractometer, a simple optical instrument that measures how light bends as it passes through a thin layer of honey. A drop of honey is placed on the refractometer's prism, and the beekeeper reads the measurement through an eyepiece.
Many honey refractometers are calibrated to show both Brix and moisture content simultaneously, making it easy to determine whether honey is ready for harvest or needs additional time in the hive for the bees to further reduce the moisture content.
Quality honey typically has a Brix value between 79.5 and 84, corresponding to a moisture content of 14.5 to 18.6 percent. Values above 80 Brix (below 17 percent moisture) are considered excellent and indicate honey that is well-ripened and resistant to fermentation.
Beekeepers use a handheld refractometer, which measures how light refracts through a thin sample of honey. It is a quick, inexpensive field tool that provides an immediate reading. A small drop of honey on the prism is all that is needed.
Honey with too much moisture (low Brix) can sometimes be further dried using a dehumidifier in a warm room or by returning uncapped frames to a strong hive for the bees to finish processing. However, if the honey has already begun fermenting, it cannot be returned to its original state.
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