The Diesel Exhaust Fluid (DEF) Test Strip is a diagnostic tool used to verify the quality of diesel exhaust fluid in the fluid tank and to detect the presence of diesel fuel contamination that can affect emission system performance. It changes color when exposed to contaminated fluid, making quality issues easy to identify, and uses color intensity to indicate the concentration level of fuel contamination, and allows quick visual inspection without the need for electronic equipment. Attributes:• Supports routine inspection of diesel exhaust fluid condition.• Helps prevent damage caused by contaminated exhaust fluid.• Contains 50 strips and measures the presence of hydrocarbons in DEF and antifreeze coolant.Applications: The Diesel Exhaust Fluid Test Strip is used by inserting the strip into diesel exhaust fluid from the tank to evaluate fluid quality. In this application, the strip visually indicates diesel fuel contamination and concentration level.