Our friends at Interscan have prepared a nifty PowerPoint presentation entitled "Issues with low concentration gas detection in ambient air." (1.9 MB)
While this may seem like an arcane subject, it really shouldn't be. Virtually every industry is affected by regulatory agencies that set compliance levels, and keep lowering them, for the level of toxic compounds in ambient air. Yet, the pitfalls of attempting to measure these concentrations are not well publicized—at all.
Interscan details three areas of concern:
- Calibration issues
- Zero gas issues
- Interference issues
The information presented is practical and easy-to-understand. What's more, unlike so many other authors of PowerPoint content, Interscan distributes the native file, rather than a pdf version.
I mention this because, as one who does PowerPoints himself, distributing only the pdf versions has always seemed ridiculous. With the pdf, you lose all the cool formatting, and that's at least half of what makes a good presentation. Years ago, this practice could be justified since it reduced the file size, but with today's broadband speeds, it is no longer appropriate.
Interscan offers additional PowerPoint shows for free download, as well.
Check them out.