This is not legal advice and is for educational purposes.
From the FAA
What's an Agricultural Operation?
Under Part 137, the following aircraft operations are considered agricultural by nature:
Dispensing any economic poison as defined in...
IMHO as a business, the cost of the sensor vs how much work is available for a sensor like that is prohibitive. We fly thousands of acres per season and I wouldn’t purchase one. It’s great for special purpose and research. Also not many...