AQA 23-32 stack and exhaust gases

May 2023

This proficiency test is part of the National Measurement Institute's (NMI's) 2023 proficiency testing program for gas mixtures.

Registrations close 1 March 2023.

Test materials

We will supply each sample:

  • in a 5 L gas cylinder 
  • with a AS2473 Type 20 outlet
  • at approximately 25 bar pressure

The gas samples will contain the following components (nominal mole fractions only):

  • Carbon dioxide: 2 %
  • Carbon monoxide: 1 %
  • Propane: 0.02 % 
  • Nitrogen: (balance)

Sample distribution and reporting

  • We will distribute samples by 1 May 2023. 
  • You must submit your measurement results and return the sample cylinders by 1 July 2023.


There are 3 price options to participate: 

  • $1600 if we supply sample cylinder at 25 bar, and you return it after testing 
  • $3600 if we supply a sample cylinder at 100 bar and you keep the sample to use as a calibration standard
  • $4200 if we supply 2 cylinders—a calibration standard and a sample—and you return the sample after testing

These prices include GST and delivery to Australian sites.

You will need to pay extra for:

  • all international freight and duty charges
  • return delivery

To apply

  1. Read our proficiency testing terms and conditions.
  2. Email with your:
  • contact name
  • phone
  • postal address
  • delivery address
  • organisation