Atago Digital Refractometer:

This pocket refractometer can easily measure the moisture percentage in honey and displays the reading digitally. It is ergonomically designed to be comfortable, easy to use, light and compact. This highly portable unit can take measurements out in the field or in the honey house. Measurement range 12.0% - 30.0% Measurement accuracy /- 0.2%. Automatic temperature compensation, IP65 water resistant classification, easy to clean under running water.