Labtron Acid Number Tester is a microprocessor-controlled unit, compliant with ASTM D664-2011, that uses potentiometric titration to measure acid numbers in oils. It offers a 0-1800 mV range, 0.05 mg KOH/g accuracy, 10 mL burette (0.001 mL precision), real-time curves, auto cleaning, and endpoint detection.