This Hertfordshire firm develops sensors that monitor the temperature of critical electrical systems to prevent overheating, the leading cause of power failure in electrical equipment. Its technology is used by data centres, as well as customers in the oil and gas, healthcare, marine and utilities industries. The company’s growth has partly been driven by the increasing use of sensors and the data they gather, with manufacturers expected to use monitoring devices in their equipment to spot performance problems. Exports accounted for 99% of its £5.1m sales this year, under founder and chief executive Ross Kennedy, 69.

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Company details
Year2019
Rank64
CompanyQHi Group
ActivityMonitoring systems developer
LocationHertfordshire
Average 3 year sales growth71.02%
Latest sales £000s*5,102
Staff15
Founded1988
Websitewww.qhigroup.com

If applicable:

* supplied by company † annualised figure