8www.XSscuba.com
WARNING: This section contains important information regarding the use of this regulator
with enriched air nitrox. Do not use this regulator with enriched air nitrox if you do not fully
understand this section. To do otherwise puts you at risk of serious injury or death.
WARNING: Obtain an enriched air nitrox diving certication. In order to fully understand
the risks involved with diving elevated percentages of oxygen (above 21%), you must obtain a
certication in enriched air nitrox from a recognized training agency.
Your Highland regulator has been prepared for use with enriched air nitrox (EAN) where the oxygen
percentage does not exceed 40% (EAN40). This is because your regulator was built to a high
standard of cleanliness using EAN compatible parts and lubricant.
If it is your intention to use your new XS Scuba regulator with EAN up to 40%O2, it is critical that you
maintain the internal cleanliness of your regulator (see section on Care and Maintenance).
If it is your intention to use your regulator interchangeably with breathing air, the breathing air
should be “oxygen-compatible” or “hyper-ltered” whereas the condensed hydrocarbons in the air
do not exceed 0.1mg/m3. Your local Highland / XS Scuba Dealer can help you determine whether
the breathing air they provide condensed hydrocarbons in the air do not exceed 0.1mg/m3. Your
local Highland / XS Scuba Dealer can help you determine whether the breathing air they provide
meets this criterion.
Enriched Air Nitrox Use
