The problem is not whether we can digitize the sense of smell, but that no industrial process currently relies on it by default. The real challenge is identifying the first scalable use case that proves measurable business value (sniphi team member here).
There are a few industries that use odorants/aromas.
What is the limit of detection on the sensors? Can they reliably pick up compounds in the parts per billion range? Parts per trillion?
The nearest current use of detection of particles in the air that I can think of is smoke and carbon-monoxide detectors for safety. Could adoption on these smart versions like Nest or Ring by adding your sniphi detector provide other types of early warning systems for safety, air quality or sensing?
Some thoughts are musty odors from mold/mildew, rotten egg smells indicating gas leaks, and fishy/burning plastic odors from electrical issues.