- Accurate and Versatile: This Refractometer is an essential tool for automotive owners, providing precise measurements for a variety of fluids. It measures the freezing point of antifreeze, the specific gravity of battery acid, windshield washer fluid, and urea concentration in exhaust fluid (DEF). - Easy-to-Use: Equipped with automatic temperature compensation, this Refractometer simplifies the measurement process. Just place a few drops of fluid on the prism and read the clear scale. Its intuitive design ensures quick operation, enabling you to assess your automotive fluids with ease. - Comprehensive Testing Range: The Refractometer features a wide measuring range suitable for multiple automotive applications. - Freezing point of antifreeze: -50 to 0 (for ethylene glycol or propylene glycol) - Specific gravity of battery acid: 1.10 to 1.40 kg/l - Freezing point of windshield washer fluid: -40 to 0 (for ethanol or isopropyl alcohol) - Practical and Portable: This lightweight, compact instrument combines four crucial functions into one device. Its portability allows you to carry it easily, making it a reliable tool for both professional mechanics and DIY automotive enthusiasts. - Use Scenarios: - Test the freezing point of your antifreeze before winter to prevent engine damage. - Check the specific gravity of battery acid to ensure optimal battery performance. - Evaluate windshield washer fluid concentration to maintain visibility in adverse weather. This Refractometer is designed to meet all your automotive fluid testing needs with accuracy and convenience.