About This

• 4-IN-1 AUTOMOTIVE FLUID TESTING – Check antifreeze and coolant, diesel exhaust fluid (DEF), lead-acid battery electrolyte, and windshield washer fluid with one compact optical refractometer. A practical tool for cars, trucks, RVs, garages, and routine vehicle maintenance
• MULTIPLE SCALES FOR ESSENTIAL FLUIDS – Measures ethylene and propylene glycol antifreeze freeze point from -50°C to 0°C, DEF concentration from 30% to 35%, battery acid specific gravity from 1.10 to 1.40Kg/L, and windshield washer fluid from -40°C to 0°C
• SIMPLE 3-STEP OPERATION – Place 2–3 drops of fluid on the prism, close the transparent cover, then look through the eyepiece toward a light source and read the boundary line on the scale. No batteries or electronic setup required
• ATC FOR MORE CONSISTENT READINGS – Built-in Automatic Temperature Compensation helps reduce measurement variation caused by changes in ambient temperature. The adjustable eyepiece provides a clear scale view for quick visual checks
• DURABLE, PORTABLE COMPLETE KIT – Features a lightweight aluminum body, textured non-slip grip, clear prism cover, and adjustable focus. Includes a protective carrying case, dropper, cleaning cloth, and calibration screwdriver for storage, maintenance, and travel