Are You Aware of the Revised Occupational Exposure Limits?

by | Aug 21, 2018 | Gas Detection, Latest News, Personal Safety

As of today, the 21/08/2018, the Indicative Occupational Exposure Limits (IOEL’s) for some gases will substantially change and will require many industrial portable gas detectors to be updated.

The implementation of new and revised Indicative Occupational Exposure Limit Values (IOELVs) for thirty-one chemical substances will help protect workers from the ill-health effects of exposure to hazardous substances in the workplace.

What gases are affected by the revised Indicative Occupational Exposure Limit?
To read the full list of gases and their new values click here.

What are the likely industries to be affected by the proposed changes?

  • Construction
  • Engineering
  • Manufacturing (foundries, steel making, chemical manufacturing, welding and fabrication)
  • Motor Vehicles and Transport (diesel and petrol fuels)
  • Food and Drinks Industry
  • Mining and Tunnelling
  • Agriculture
  • Pharmaceuticals and Chemical Manufacturing
  • Energy Production (Coal)


Which gas detection products does this revision apply to?
All portable gas detectors are affected by the change. There are 5 common gases which are affected by the change including Carbon Monoxide which will require many gas detectors used in industry to be updated.

Does the new directive affect fixed gas detection systems?
Fixed gas detection systems are not affected.

How does this affect current portable gas detectors?
All portable gas detectors will need to be updated to comply with the new TWA and STEL alarms limits.

Are new gas detectors set to the new alarms levels?
From the 21/08/2018, gas detection equipment manufacturers should start producing new gas detectors with the new alarm levels pre-programmed in. If you have bought one and it’s programmed with the old alarm levels, contact a1-cbiss. We are now offering a free gas detector health check

What’s included in the health check?

  • Alarm levels updated
  • Functional check


What Are Workplace Exposure Limits?

WELs are concentrations of hazardous substances in the air, averaged over a specified period of time, referred to as a time-weighted average (TWA). Two time periods are used:
■ Long-term exposure limit (8-hr TWA reference period)
■ Short-term exposure limit (15 minute reference period)

IOELV Directives are implemented in the United Kingdom by establishing WELs under COSHH for the substances in question. WELs, taking into account the IOELVs are approved by the Health & Safety Executive and subsequently published in EH40 Workplace Exposure Limits guide.

Employers have a duty to ensure each of their employees is not exposed to any concentration of a substance in excess of the Workplace Exposure Limits.

Call 0151 321 0275 or email to book in your free gas detector health-check

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