SCR-equipped engines require the periodic addition of Diesel Exhaust Fluid (DEF, a urea solution) to enable the process. DEF is available in a bottle from most truck stops, and some have installed bulk DEF dispensers near the Diesel Fuel pumps. However, to ensure the proper operation of the SCR system, operators must ensure the DEF in their vehicle consists of a 32.5% Urea / Water solution. The OTC DEF Refractometer helps technician determine an accurate measurement of UREA concentration in DEF or AdBlue solution.

Product Features:

• Scale: 0.5% line graduations.
• 32.5% Indicated
• Scale 15-40%
• Waterline and 20 Deg. C
• Kit includes: Refractometer, dropper, lens wipe cloth, instructions and quick guide, screwdriver and case.