You may be asked to produce the relevant diving certification card to obtain Compressed Air, Nitrox, Trimix and Oxygen fills.
In recreational diving terms, enriched air nitrox (EAN) refers to any nitrogen/oxygen gas mixture with an oxygen concentration higher than the 21 percent found in normal air--32 percent oxygen is the most common--and tanks filled with EAN are often clearly marked with a nitrox tank band and have the mix percentage written somewhere near the tank valve. It is this higher percentage of oxygen, and the proportionately lower percentage of nitrogen, that allows divers to lengthen no-decompression limits, shorten surface intervals and get an added safety buffer for decompression sickness in certain diving circumstances.
What are the benefits of diving with nitrox?
The best application of nitrox is in the 50- to 100-foot range because no-decompression times for dives shallower than 50 feet are often so long that most recreational divers will empty their tank before they run out of dive time. In this deeper depth range, nitrox can have a huge effect on allowed bottom time, even doubling it under the right circumstances. For example, take EAN 36 to 100 feet and you can add 20 minutes to your 20-minute dive--a substantial benefit. Take that same mix to 60 feet, where the normal bottom time is 50 minutes, and your no-decompression limit extends to 130 minutes.
Maximum pressure for Nitrox fills up to 70% Oxygen is 240 bar.
Maximum pressure for Nitrox fills above 70% Oxygen fills is 200 bar.
Oxygen Clean
Because we use partial pressure blending to do Nitrox fills, your cylinder and valve must be "Oxygen Clean". During the fill process 100% pure Oxygen will be used.
Nitrox Fill Prices: (inc GST)
Oxygen: 5.0 cents per litre
Air: $ 5.00 per fill for O2 less than 100%
Blending: $ 5.00 per fill