What is Diesel Exhaust Fluid (DEF)?
Diesel Exhaust Fluid is a solution made up of purified water and 32.5 percent automotive-grade urea
that is used as a carrying agent for the ammonia needed to reduce nitrogen oxide (NOx)
emissions from vehicles into nitrogen, water and carbon dioxide (CO2). Diesel Exhaust Fluid is
monitored for quality and certified by the American Petroleum Institute, ensuring that Diesel
Exhaust Fluid is a stable, non-toxic, odorless and completely safe solution. The urea used for
Diesel Exhaust Fluid is automotive-grade. Urea in additional forms is widely distributed for
many other industrial and agricultural needs, including emissions control at public utilities and power plants.
Most heavy duty engine (Class 7-8 trucks) manufacturers, have chosen to utilize Selective Catalytic Reduction (SCR).
This Includes Detroit Diesel (DD13, DD15, and DD16 models), Cummins (ISX line), PACCAR, and Volvo/Mack.
EPA regulations require all diesel engines manufactured on or after January 1, 2010 to meet lowered NOx emissions standards.
HOW DOES THE AD-7 HELP ME?
The DEF Refractometer will help determine if it is time to change out your Diesel Exhaust Fluid! Old
DEF is less efftective at treating NOx, therefore a maintained DEF fluid will help reduce NOx
and any potential tickets you may get from a cop! Did you know that research suggests that a
truck running a DEF system can get better mileage! True! Calibrate with Water
(water = 0% Urea Concentration) and wipe clean with a cotton towel, and you're ready to go!
SPECIFICTATION
Measurement range:AUS32 0-40%
Dimension: 8.03"×2.99"×2.13"
Weight:244g
Material: Aluminum
PACKAGE CONTENT:
1X Ad-7 Refractometer
1X Screwdriver
1X Firm Case
1X Cleaning Cloth
1X Instruction Manual
3X Droppers
12-months warranty
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