Aqua Lung Apeks Regulator - Manual (Page 6)

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NOTE: EN250:2000 Respiratory equipment – Open
Circuit Self Contained Compressed Air Diving Apparatus –
Requirements, Testing and Marking is a European normative
standard that was published in the year 2000, and Regulators
must be independently tested to ensure it meets these minimum
requirements. The purpose of this European Standard is to
ensure a minimum level of safe operation for apparatus down to a
maximum depth of 50 metres (164ft).
* prEN250:2012 Respiratory equipment – Open Circuit Self
Contained Compressed Air Diving Apparatus – Requirements,
Testing and Marking is a preliminary European normative
standard that is to be published in 2013, which includes new
minimum requirements such as Auxiliary Emergency Breathing
Systems, Annex A and will replace EN250:2000.