4-in-1 antifreeze refractometer for ethylene glycol, propylene glycol, for the freezing point of coolant, windshield washer fluid, AdBlue, and batteries.

General description With this refractometer, you can determine the concentration of ethylene glycol and propylene glycol in antifreeze for your car, solar system, heat pump, freezing point disk, heating system, or other water-related machinery and installations. Technical specifications Measurement range for Ethylene Glycol: 0 to -50°C Measurement range for Propylene Glycol: 0 to -50°C Measurement range for Window Cleaner (Ethanol + Water): 0°C to -40°C Measurement range for Propylene Glycol + Water (SRF1): 0°C to -40°C Urea concentration for AdBlue: 30% Battery acid density: 1.10 to 1.40 kg/L Optical system magnification: 4-8x Continuous manual focus Zero calibration with distilled water at 20°C Automatic temperature compensation between 10°C and 30°C (ATC) Usage Easy to use with instructions available in French and four other languages. Suitable for all eyesight types; however, measurements should not be taken while wearing glasses to cover myopia and hyperopia.