Introducing the Handheld 4-in-1 Antifreeze Coolant Refractometer, a must-have tool for any car owner or maintenance professional. This refractometer allows you to accurately measure the ethylene glycol and propylene glycol concentration in your car's antifreeze, as well as in your solar system, heat pumps, and other machines or systems. With a wide measuring range, you can measure ethylene glycol from -500C to 0C and propylene glycol from -500C to 0C. You can also measure the freezing point of windshield washer fluid from -40C to 0C. The temperature compensation device ensures easy and precise measurements. Our refractometer features a high-quality chrome-plated brass body that is resistant to chemical corrosion and wear. This increases the lifespan of the refractometer compared to other models with aluminum housings. The adjustable eyepiece group optical system with stepless manual focus allows for easy adaptation to all eyes. Invest in the Handheld 4-in-1 Antifreeze Coolant Refractometer for accurate and reliable measurements. Order yours today!