Without getting too technically geeky, Diesel Exhaust Fluid, or DEF, is an aqueous urea solution that's generally 32.5-percent urea and 67.5 percent deionized water. It's injected into the diesel ...
The 5025 DEF Refractometer from OTC, an SPX brand, is designed to provide a fast and convenient method for evaluating diesel exhaust fluid condition in a matter of minutes. The 5025 refractometer is a ...
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