【Vehicle Antifreeze Coolant Refractometer】This 4-in-1 coolant refractometer accurately measures ethylene glycol, propylene glycol, Diesel Exhaust Fluid (DEF), battery acid, and windshield washer fluid — all in one device. Perfect for mechanics, truck drivers, and car enthusiasts who need fast, dependable fluid testing for complete vehicle protection.
【Professional Antifreeze Refractometer 】Ensure your cooling system is always within the safe range. Instantly check the freezing point of ethylene or propylene glycol (-50°C to 0°C) to avoid overheating or freezing. This antifreeze refractometer helps prevent costly engine damage and keeps your vehicle running efficiently year-round.
【Maintain Diesel Efficiency with Accurate DEF Readings】Maintain diesel engine efficiency and emission compliance with confidence. This DEF refractometer verifies urea concentration (30%–35%) to prevent SCR system failures, costly repairs, and reduced fuel efficiency. Essential for diesel trucks, RVs, and farm equipment.
【Reliable Battery Acid & Washer Fluid Testing】Quickly check battery acid specific gravity (1.10–1.40 kg/L) to monitor battery charge condition, and confirm washer fluid freezing protection (-40°C to 0°C) to ensure safety during winter driving. This antifreeze tester helps catch maintenance issues before they become serious problems.
【Built to Last, Easy to Use】this coolant refractometer tester is made crafted from durable aluminum alloy with a non-slip grip and crystal-clear optical lens. Simple operation — just place a few drops of fluid, close the prism cover, and read the scale. No batteries, no calibration hassle, no guesswork.