Achieve unparalleled accuracy in Diesel Exhaust Fluid (DEF) and AdBlue testing with the Heathrow Scientific Handheld Urea Refractometer. Engineered with the largest, clearest scale available, featuring sharp figures and superior contrast, this precision instrument significantly enhances reading accuracy for every user. Its innovative rubber grip expertly blocks hand heat, eliminating temperature-induced errors and ensuring reliable results in any environment. Built for enduring performance, this rugged handheld DEF refractometer boasts an all-metal housing for its optical glass prism, allowing rapid temperature equilibrium between the sample and prism. Designed with practicality in mind, the non-roll stand secures the device firmly on any flat surface, preventing accidental drops. Invest in confidence with a product that delivers consistent, precise urea concentration measurements vital for maintaining vehicle performance and compliance. Each purchase is backed by a robust 5-year warranty and includes a durable zippered vinyl carrying case, a convenient plastic transfer pipette, and a comprehensive instruction manual, ensuring you have everything needed for immediate and effective use. Key Features & Benefits Superior Visibility: Features the largest, clearest display scales with high contrast for quick, accurate readings, even with multiple users. Unmatched Precision: Crafted with high-quality optical glass for consistent, reliable urea concentration measurements. Built to Last: Durable, industrial-grade design includes a non-roll stand feature to keep the unit secure on any flat surface. Temperature Stability: Tactical, non-slip rubber grip prevents hand heat transfer, significantly reducing temperature-related reading errors. Rapid Equilibrium: Prism encased in all-metal housing ensures sample and prism quickly reach temperature equilibrium for fast results. Extended Protection: Comes with a comprehensive Five-Year Warranty for complete peace of mind. Specifications Urea Range: 0 to 60% Resolution: 0.5% Accuracy: ±0.5% Maximum sample temperature: 90°C (194°F) ATC is not included Size dimensions: 5.7 x 1.57 x 1.57 in. (145 x 40 x 40 mm) Package Includes Heathrow Scientific Refractometer (model URX-60) Durable Vinyl storage/carrying case Precision Transfer pipet Comprehensive Operation manual 5 Year Warranty