Dieseltune has been manufacturing diesel diagnostic products for over 40 years. Many innovative diagnostic tools have been produced over the years, but a significant addition to the range was introduced in October 1992 - the DX.210 smokemeter established Dieseltune as a world leader in the field of diesel engine emissions analysis. Dieseltune joined Crypton in April 2001 to create one of the largest independently owned automotive equipment manufacturers in Europe.