OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer

• The refractometer is a portable precision optical instrument used for measuring the diesel exhaust fluid concentration
• When a liquid sample is placed on the prism the light passing through it is bent and the more concentrated the liquid the more the light will bend
• The refractometer contains a reticle or scale that is enlarged through the eyepiece to measure this light and the values on the scale have been established to evaluate the DEF condition
• EPA regulations require all diesel engines manufactured on or after January 1 2010 to meet lowered NOx emissions standards
• Most heavy duty engine manufacturers have chosen to utilize SCR including Detroit Diesel DD13 DD15 DD16 Cummins ISX line PACCAR and Volvo-Mack

The Refractometer is a portable, precision, optical instrument used for measuring the Diesel Exhaust Fluid (DEF) concentration. When a liquid sample is placed on the prism, the light passing through it is bent. The more concentrated the liquid, the more the light will bend. The Refractometer contains a reticle, or scale, that is enlarged through the eyepiece to measure this light. The values on the scale have been established to evaluate the DEF condition. EPA regulations require all diesel engi