F&ST has been working on updating gas detectors to comply with the recent changes to the workplace exposure standards (WES) released by WorkSafe NZ in December 2019 (edition 11). 

Changes include the following:

  • Hydrogen Sulphide 
    WES-TWA changed to 5 ppm
    WES-STEL changed to 10 ppm
  • Sulphur Dioxide
    WES-TWA removed
    WES-STEL 0.25 ppm