Firewater systems sit there doing nothing for years, then have to work first time. The instruments watching them need to be just as dependable.

Ajax flow switches have been used on fire protection sprinkler systems across the petrochemical sector for more than 70 years. On an oil rig, they confirm water is moving through the fire main or sprinkler pipework and send a signal to the fire and gas panel. The XP flameproof range is ATEX certified for hazardous areas. Made in Stockport, built to last, and backed by a company that has been doing this since 1947.