Maximize your fleet's uptime and regulatory compliance with the OTC Tools & Equipment OTC-5025 DEF Refractometer. Today's heavy-duty diesel engines rely on Selective Catalytic Reduction (SCR) systems to meet stringent EPA emissions standards. The heart of this system is Diesel Exhaust Fluid (DEF), a urea-water solution requiring a precise 32.5% urea concentration for optimal performance. Improper DEF concentration can lead to costly repairs, downtime, and potential legal issues. The OTC-5025 eliminates this risk. This portable, easy-to-use refractometer provides accurate DEF concentration readings in seconds, ensuring your fleet consistently meets regulatory requirements. Its durable design and comprehensive kit (including dropper, cleaning cloth, screwdriver, and carrying case) make it ideal for on-site testing in demanding environments. Avoid costly repairs and downtime; maintain regulatory compliance; and protect your investment. The OTC-5025 is the indispensable tool for any fleet manager committed to peak efficiency and regulatory adherence. The OTC-5025 is more than just a tool; it's an investment in your fleet's longevity and operational success. Invest in the OTC 5025 today and ensure your fleet maintains peak performance and regulatory compliance.