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OTC 5025 Diesel Exhaust Fluid (DEF) Refractometer
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Best Review
El-Tirador2025-04-03
Customers like the value for money, functionality, and ease of use of the electromechanical gauge. They mention it works great for troubleshooting def codes, is easy to read, and durable. Some appreciate the accuracy, saying it's perfect for self-testing of the DEF required for today's diesel powered vehicles.
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