The apparatus for the determination of existent gum in fuels by jet evaporation (ASTM D 381 – IP 131 – ISO 6246) is a reliable and efficient tool for testing gasoline. It is available in two versions: one for the “Air Jet” test and another for both the “Air and Steam Jet” tests, which includes a built-in steam superheater. The apparatus features a robust benchtop steel case with a heating block, steam generator, and air blower. It includes a high-precision flowmeter, stainless steel gauge, and microprocessor thermoregulator with a digital display for accurate temperature control. With a CE mark and user manual, this apparatus is designed for easy operation and reliable performance.