Multiple life-threatening air contaminants can enter SCUBA cylinders via the filing air compressor including carbon monoxide, excess carbon dioxide, oil residues and other hydrocarbons. As well as SCUBA cylinders, any high or low pressure system delivering breathable air can be affected, such as hookah units and breathing systems used in industrial applications.
Testing for these contaminants is mandatory for commercial operators and highly recommended for private compressors.
Carbon Monoxide (CO) - Headache, dizziness, weakness, nausea, vomiting, shortness of breath, impaired judgment, confusion, unconsciousness
Carbon Dioxide (CO2) - Hyperventilation, dizziness, confusion, unconsciousness
Volatile Hydrocarbons - Fatigue, headache, confusion, impaired judgment, numbness, cardiac arrhythmia, loss of consciousness
Oil (condensed) - Headache, nausea, impaired respiratory function
Dust (particles) - Impaired respiratory function
Testing of remote air compressors by Air Purity LTD is straightforward and convenient:
Tests cost $250 including GST. This fee is payable before the sample bags will be couriered from the Air Purity office.
Important: Pre-Christmas testing needs to done by the 19th of December!
Compressor air is tested for the presence of the following potentially dangerous issues:
A test certificate is issued outlining the results and a number of other relevant details. In a commercial application, this certificate is valid for three months. A copy of the test certificate can be viewed here: Example test certificate
In the case of a failed test, Air Purity can recommend several service agents nationwide.
Set up in 2013, Air Purity Limited is an independent, and 100% owned subsidiary of the New Zealand Underwater Association. In 1982, NZ Underwater identified the need to ensure safe diving practices were supported by quality assurance procedures extended to dive cylinders and air filling equipment, thus developing the SCAP (Scuba Cylinder Audit Program). Today, Air Purity is a primary point of contact for clean breathing air testing, SCAP cylinder audit and certification, air-fill operator certifications, and recreational boat training courses specific to the New Zealand underwater community.