Portable 4-in-1 Antifreeze Refractometer

1. Use: This refractometer can be used to determine the ethylene glycol and propylene glycol concentration of the antifreeze in your car, solar system, heat pumps, the freezing point of windscreen washer fluid, heating system or other machines or systems 2nd measuring range: ethanediol (ethylene glycol): -500c to 0c; Propanediol (propylene glycol): -500 C to 0 C; Windshield water - ethanol + water: -40 C to 0 C, propylene glycol + water Srf1): -40 C to 0 C. Urea concentration 30% - 35%, battery acid from 1.10 to 1.40 kg / L. 3. Temperature compensation: temperature compensation device included, to ensure that the measurement is easy and convenient for precision measurement: adjust the optical system of the eyepiece group: 4-8 times the amplification system, stepless manual focus. Can adapt to all eyes. 4. High quality: our chrome-plated brass body is resistant to chemical corrosion and wear-resistant, the service life of the refractometer is increased many times that of other aluminum housings.