This unit measures the induction period for oxygen in gasoline, and allows the weight of gum and residue in aviation fuel to be determined by direct weighing. Comprising a heated water bath with reflux condenser, a cold water plunge tank for cooling test vessels after each test, and an integral system for charging oxidation vessels prior to test. The Seta Auto-Oxi Control System provides automatic monitoring of up to four pressure test vessels. High quality pressure transducers and system components ensure reliable operation and fully traceable results.