This Hertfordshire company designs and manufactures sensors and instrumentation able to detect 480 volatile organic and toxic compounds, like benzene and acetone. Its devices are used in the manufacturing, automotive and oil and gas sectors, and in research labs, airports and high-rise buildings. Growth has been driven by the increasing awareness of the environmental harm that can be caused by certain gases, and underpinned by health and safety regulation. China and India are its fastest-growing markets, and 70% of sales are international. Customers include the German government, Chinese metro and international oil companies. Under managing director Duncan Johns, 56, profits have almost quadrupled over three years to £2.9m in 2018.

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Company details
Year2019
CompanyIon Science
ActivityGas detection manufacturer
LocationHertfordshire
Profits £000*2,927
Sales £000*14,832
Staff100
Founded1989
Websitewww.ionscience.com