Lewis John

UK Sales Manager - Scientific Applications

Lewis is ET’s specialist for our range of cutting-edge scientific and research instrumentation.

Lewis holds a degree in chemistry and joined ET in 2016 under the mentorship of ET’s Managing Director, Duncan Mounsor, to help grow the rapidly expanding scientific and research instrument sales sector. Since then Lewis has flourished in this role and provides expert pre-sale product application and scientific advice as well as market leading levels of post-sale customer support. Lewis’ product knowledge is wide and extensive and includes trace gas monitoring, greenhouse gas monitoring, ultra-fine and nano particulate monitoring, isotopic water monitoring and complex atmospheric chemistry monitoring.

Lewis regularly attends and presents at various scientific conventions, conferences and trade shows, some of which he has presented findings from mobile geospatial air quality monitoring research conducted by himself.

Lewis keeps his knowledge up to date with visits to supplier training sessions in their respective global locations.


  • BSc (Hons) Chemistry


  • Member of the Royal Society of Chemistry (MRSC)