Precise measurement Our refractometer is a precision optical instrument used to measure the freezing point of antifreeze. It uses the principle of total reflection to accurately determine the refractive index of the solution, enabling precise calibration of the concentration and performance of the test fluid. Versatile uses This refractometer can determine the freezing point of ethylene glycol and propylene glycol based antifreeze agents as well as the freezing point of windscreen washer fluid for cars. It can also check the specific liquid and condition of lead-acid battery electrolytes. Temperature compensation Equipped with temperature compensation, this refractometer ensures accurate measurements in a temperature range of 10 C to 30 C. This feature provides reliable and consistent results under different environmental conditions. Clear scale and high accuracy The refractometer features a clear, easy-to-read scale for fast and accurate measurements. Its high accuracy ensures that the measurements are highly reliable. Use scenarios - Automotive antifreeze maintenance: verify the freezing point and concentration of ethylene glycol or propylene glycol based antifreeze to ensure adequate protection against freezing. - Battery upkeep: assess the electrolyte concentration and condition in lead-acid batteries to gauge performance and health. - Winter preparedness: check the freezing point of windscreen washer fluid to prevent fluid from freezing in cold weather.