Scarlett was a Fellow of the Royal Academy of Engineering, a Fellow of the Institute of Physics, and a Fellow of the Institution of Chemical Engineers.  He was awarded honorary doctorates (DSc) by the University of Coimbra (1997) and Loughborough University (1999).
In 2000, the American Institute of Chemical Engineers gave him their Award for Lifetime Achievement in Particle Technology.
In 2006 the Fifth World Congress on Particle Technology had a Brian Scarlett Memorial Session of invited papers, with another at the Seventh in 2014.
In 2010 a Brian Scarlett Scholarship Fund was set up by the Royal Society of Chemistry to support student travel to particle technology events.