HHTEC 4-in-1 Frost Protection Refractometer Ethylene Glycol (G11, G12), Propylene (G13), for Freezing Point of Cooling Water, Windscreen AdBlue, Battery, Diesel Exhaust Fluid (DEF)

Use: with this refractometer you can determine the ethylene glycol and propylene glycol concentration of the antifreeze of your car, solar system, heat pumps, the freezing point of windscreen washer water, heating system or other machines or systems Measuring range: ethanediol (ethylene glycol) G11/G12: 0 to -50 °C; propanediol (propylene glycol) G13: 0 to -50 °C; windscreen water - ethanol + water: 0 °C to -40 °C, propylene glycol + water (SRF1): 0. ° C to -40 °C. AdBlue: urea concentration 30% - 35%, battery acid from 1.10 to 1.40 kg/L. Easy to use, with instruction manual in German and 4 languages. Precision measurement; adjust the eyepiece group optical system: 4-8 times the gain system, stepless manual focus. Can adapt to all eyes. To cover myopia and hyperopia, you do not need to observe the measurement data with glasses. Calibration: zero calibration with the distilled water at 20 °C, automatic temperature compensation between 10 °C and 30 °C (ATC).