Extech RF40 Coolant/Battery Acid Refractometer, -60 to 32 F, 1.15 to 1.30 SG

Use these refractometers to take accurate and repeatable measurements of sugar, salt, lubricants, antifreeze, cutting fluids, and more! Simply place 2 or 3 drops of your sample on the prism; the focus adjustment makes the scale easy to read. Automatic temperature compensation ensures accurate readings from 50 to 86°F (10 to 30°C).