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Home » Authors » Geoff Hewitt

Geoff Hewitt

Geoff Hewitt is president of ION Science (Americas) LLC. He can be reached at (802) 244-5153 x201 or geoff.hewitt@ionscience-americas.com.
Articles

ARTICLES

Tools of the IH trade

Geoff Hewitt
November 1, 2007
If we look at the range of instrumentation available to today’s industry professional, conventional nomenclature short-changes the products. Gas detection comes in many interesting “flavors.”
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How PID technology is improving instrumentation performance in high-humidity environments

Geoff Hewitt
October 2, 2006
Early photoionization detector (PID) development is credited to research done in the U.K. in the mid 1960s. An open cell PID for gas chromatography (GC) was invented by Professor Lovelock at Cambridge University. It provided improved sensitivity in an era where the thermal conductivity detector was king and where gas chromatography systems operated under vacuum, allowing the open cell PID to operate. The advent of the flame ionization detector (FID) resulted in the demise of the open cell PID as GC systems began to be operated under pressure rather than vacuum.
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2021 February

Here’s the summary: Among the articles in the February 2021 issue of ISHN Magazine, we dive deep into anti-bullying policies, discuss cold weather safety tips and offer advice on creating an emergency response plan for remote work sites.

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