Quote:
Originally Posted by JohnH12
I wasn't sure about which forum this should go in so I figured this one is read by the most folks.
I just got a refractometer to measure the DEF in my RV.
[URL="https://www.amazon.com/gp/product/B073Q2LSG9/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1"]
I know that perfect DEF is 32.5% Urea. The refractometer I have shows a scale from 32 ~ 35.
If 32.5% is perfection what is the acceptable range?
IO have a 2018 Tiffin RED 33AA with a 360 Cummins engine.
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Concentration must be 32.5% +/- 0.7%.
That means a low of 31.8% or a high of 33.2%.
How far beyond those limits before sensors respond or poor performance/failure begin is unknown, but the 32.5% concentration is what the CAT is calibrated to for most efficient NOx reduction and dosing.
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Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
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