NITROX As they leave the factory standard Apeks regulators are suitable for use with oxygen enriched gases providing the oxygen content does NOT EXCEED 40%*. For mixtures containing more than 40% we offer a range of regulators suitable for use with Nitrox and Oxygen (also known as oxygen enriched air or EAN – Enriched Air Nitrox). Our comprehensive range, for all you dive requirements comprises the DS4 first stage and the ATX200, ATX100, ATX40 regulators. This equipment has been specially cleaned and assembled in our purpose built class ‘J’ (10,000) Clean Room using oxygen safe components and lubricants and are suitable for 100% oxygen use. All first stages are available in DIN M26 fitting. Nitrox equipment will be supplied in Europe in accordance with the peEN 144-3 and the prEN13949 when the texts are published. Standard Apeks regulators can be professionally converted to oxygen service and oxygen compatibility kits are available to Apeks dealers together with instructions for O2 use.