Is the intensity of smell scientifically measurable?

I was just wondering, if smell / intensity of smell is something purely subjective to the observer, or if it is in some way scientifically objectively measurable?

I mean, science can measure practically anything that is material and perceivable to humans. For instance the hotness of chili peppers is determined by their content of capsaicin acid and expressible on the Scoville scale.

Now smell, as far as I know, is the result of very tiny particles and vapors that are given of by the object that smells.

Given the right kind of laboratory equipment these should be measurable, right?

So can smell be objectively quantified in some way? What kind of scale can be used to express these quantities?

To put it in a crude way: If a group of friends where to make a farting contest where a price is given for the smelliest fart, could the judges use an objective method to measure smelliness and not just their subjective impression?

This is a purely hypothetical question by the way, and not meant as a joke. I really would like to know.

Thanks in advance for your ideas!

@Sefegiru said in #1:
> I was just wondering, if smell / intensity of smell is something purely subjective to the observer
To the *smeller.
All our senses are subjective, we all vary in our capacity to sense reality. Some have better vision, hearing, etc.
But everything can also be objectively measured.

> So can smell be objectively quantified in some way? What kind of scale can be used to express these quantities?
Yes. you measure the concentration of particles that make that specific odor you want to quantify.