The North Sea is hard on equipment. Salt, vibration, weather and the odd heavy-handed fitter. Cheap instruments do not last long out there.

The Ajax XP flameproof flow switch is a British made unit designed for hazardous areas, with an ATEX certified enclosure and a reputation for longevity. F. Bamford has supplied process instrumentation to the petrochemical sector, onshore and offshore, for more than seven decades. Operators and maintenance contractors working North Sea assets use Ajax switches to alarm on loss of flow in cooling water and fire protection lines, where a missed alarm is not an option.