This professional handheld honey refractometer covers a measuring range of 58% to 90% water content, specially customized for raw honey detection to judge honey ripeness and quality grade. Built with high light transmittance optical prism and ATC automatic temperature compensation system, it corrects reading errors from ambient temperature fluctuation and delivers accurate, instant data without batteries. The ergonomic lightweight aluminum body with anti-slip rubber grip supports one-handed operation for apiary field sampling, honey factories and retail inspection. Simply place one drop of honey on the prism lens and read clear scale values through the eyepiece. It helps beekeepers distinguish mature high-density honey from diluted unripe products, avoid fermentation and extend honey shelf life. The smooth sample tray is easy to wipe clean after each test. Compact, durable and maintenance-free, this precision testing tool is a must-have for beekeepers, honey processors and honey wholesale merchants to standardize honey quality control.