Check the listing for details. REICHERT 13940013 Digital Refractometer,Accuracy 0.1 16D199. Condition: New. Listed at 558.57 USD. Refractometer, Automatic, Range 0.0 to 50.0 Diesel Exhaust Fluid (Urea), Automatic Temperature Compensation Yes, Accuracy +/- 0.1 Percent, Resolution 0.001, Function Diesel Exhaust Fluid, Known As Def/Adblue/Arla/Aus32, Features (2) AAA Batteries, Detachable Neck Lanyard, Durable Storage Case, Length 3 29/32, Width 2 1/8, Height 1.06, Includes (2) AAA Batteries, Neck Lanyard, Storage Case, Manufacturers Warranty Length 1 yr The Reichert DEF-Chek(R) Automatic Digital Refractometer is specifically designed for testing Diesel Exhaust Fluid. It provides accurate measurements of of diesel exhaust fluid concentrations within +/-0.1%, and can maintain optimal SCR performance at the ISO required 32.5% concentration for diesel exhaust fluid. Meets ASTM D7821-12 Standard test method for field deter.