Tom Parry Jones, Welsh chemist, invented the breathalyzer (born 1935)

Thomas Parry Jones OBE was a Welsh scientist, inventor and entrepreneur, who was responsible for developing and marketing the first handheld electronic breathalyser, winning the Queen's Award for Technological Achievement in 1980 for the work. Born and raised on Anglesey, he attended Bangor University and went on to study for his doctorate at University of Alberta, Canada. Prior to his work on the breathalyser at Lion Laboratories, he was a lecturer at the Royal Military College of Science and the University of Wales Institute of Science and Technology. He established the Dr Tom Parry Jones Endowment Fund at Bangor University in 2002. After selling Lion Laboratories in 2005, he set up PPM Technology and Welsh Dragon Aviation. A trust was set up in his, and his wife's, names. The Tom and Raj Jones Trust promotes work by young entrepreneurs.

A breathalyzer or breathalyser, also called an alcohol meter, is a device for measuring breath alcohol content (BrAC). It is commonly utilized by law enforcement officers whenever they initiate traffic stops. The name is a genericized trademark of the Breathalyzer brand name of instruments developed by inventor Robert Frank Borkenstein in the 1950s.