4-in-1 refractometer for ethylene glycol and propylene glycol antifreeze, for cooling water, disc water, AdBlue, and batteries

General Description This 4-in-1 refractometer is designed to measure the concentration of ethylene glycol and propylene glycol, as well as the freezing point of various liquids such as coolant, disc water, AdBlue, and batteries. It is ideal for use in cars, solar installations, heat pumps, and other heating or water systems. Technical Specifications Measuring Range: Ethanediol (ethylene glycol): 0 to -50 °C Propanediol (propylene glycol): 0 to -50 °C Windshield Washer Fluid (ethanol + water): 0 °C to -40 °C Propanediol + water (SRF1): 0 °C to -40 °C AdBlue: 30% - 35% urea concentration Battery Acid: 1.10 to 1.40 kg/L Calibration: Zero calibration with distilled water at 20 °C Automatic Temperature Compensation (ATC): between 10°C and 30°C Magnification: 4-8x with stepless manual focus Operation This refractometer is easy to use and comes with a manual in French and three other languages. It is designed to be suitable for all users, including those with vision problems, without requiring glasses to read the measured data.