It is indicator of the combustion qualities of avaiation turbine fuels and kerosene. The fuel sample is burned in the smoke point lamp and the maximum flame height obtainable without smoking measured.
Consists of brass lamp body with chimney, gallery, 0-50mm black glass scale with white markings, brass plated door with curved glass window, candle socket and plated brass candle with wick tube and air vent. It is mounted on a cast iron base with stainless steel support rod.