Measure all your fleet vehicle fluids with a single instrument. MISCO’s made-in-the-USA, digital handheld Palm Abbe refractometers provide precise readings of your vehicle fluids including: Diesel Exhaust Fluid (DEF/AdBlue) concentration, engine coolant concentration and freeze point, brake fluid water content and boiling point, and even washer fluid concentration and freeze point. Palm Abbe refractometers can be custom-programmed with up to 5 different measurement scales so your device is perfectly tailored to your operation. A world leader in the refractometry field for 70 years, MISCO is headquartered in Solon, Ohio.