Air quality testing for SCBA is dictated by BS EN 12021. This determines that the air supplied via cylinders with a pressure of 40 bar and over should be tested to this standard. Testing is still required to a lower specification for industrial compressor air fed supply.
This should be performed 3 monthly at minimum by a competent person and may require further testing determined by your own risk assessment.
Records must be kept to ensure a continued safe supply of air to the wearer.
Should you prefer we have air quality testing equipment available for hire.