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MSMWHS217 – Gas Test Atmospheres

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About Course

Discover why OzHST, with over 30 years of industry experience across mining, natural gas, power stations, and solar farms, is your go-to for workplace health and safety solutions, offering small, flexible classes and over 300 tailored courses to suit your needs. Learn more here:

The MSMWHS217 Gas test atmospheres unit of competency is about testing the working atmosphere to determine if it is safe for the proposed work.  This Gas Testing training course is designed for workers who work in close proximity or directly within hazardous atmospheres in the workplace.

Atmospheric testing is required for two distinct purposes: Evaluation of the hazards of the permit space and verification that acceptable entry conditions for entry into that space exist. Testing involves the use of electronic test apparatus.

Course Duration

  • 1 Day Face to Face


The qualification does not have an expiry date however Refresher training may be required as per industry standards or employer requirements.


This unit of competence will be assessed. The assessment will be based on the principles of CBT (competency-based training). A successful outcome for this certificate will be determined by a range of different methods including written submission of work, observation of simulated and practical activities, structured questioning or discussions.

Upon successful completion of this training course, participants will be enabled to Identify legislation, regulations and safety requirements.

Students who successfully complete this nationally recognised training will be awarded the statement of attainment:

  • MSMWHS217 Gas test atmospheres

RTO # 40907

Health Security & Education Pty Ltd

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What Will You Learn?

  • Understanding the Legislative framework for gas detection.
  • Understanding the different types of gas detectors.
  • Understanding the role and functions of key components.
  • Understanding and use of special features of gas detectors.
  • How to interpret warnings, faults, and displayed messages on gas detector equipment.
  • When is gas testing required in the workplace.
  • Gas Testing Permits to work.
  • Risk assessments and the need to consider atmospheric monitoring requirements during the risk assessment.
  • The responsibilities of a supervisor in relation to gas atmosphere testing.
  • An overview of the Confined Space Permit.
  • Oxygen Deficiency, Oxygen Enrichment, Lower Explosive Levels, Carbon Monoxide. Hydrogen Sulphide, Methane and other gasses.
  • Toxic & explosive gases – their effects and safe exposure levels: TWA’s, STEL’s, IDLH’s.
  • An overview of the air densities of common gasses.
  • Risk management concepts / risk assessments.
  • Human breathing principles.
  • How to fill out gas testing log sheets.
  • Maintaining your gas detector.
  • Gas detector calibration bump testing requirements.
  • Logging and maintaining gas detector records.

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  • There are currently no prerequisites for this unit.


  • The target group will be construction workers requiring training in safely working in monitoring atmospheres within confined space and other areas, at worksites within: Civil construction, Mining, Drilling, Extractive industries, Farming etc.
  • People who supervise but do not necessarily perform tests or enter confined spaces need to be aware of the risks and equipment checks that need to be in place to adequately protect people under their control.