This maker of measuring equipment can trace its roots back to 1889 and the invention of the insulation tester, or “Megger”. Its products are used to test systems ranging from transformers to electric motors; it also offers water leak detectors. The Dover firm has donated protective equipment to GPs during the pandemic, and implemented safety measures for its staff. Chief executive Jim Fairbairn, 51, took over in 2017, and profits rose 18% to £26.8m last year.
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