Thanks all for your thoughts.
Rich, I checked out the link to RKI and spoke with a tech there who suggested two different units for this. The less expensive PS-2 unit seems about right at $460. The more expensive one runs at around $1000.
It will
- detect ethanol vapor
- trigger an alarm at a pre-determined level
- and/or is able to be rigged to a second unit like, e.g. a venting fan
This unit and system will work for me in a situation where the fire dept wants to know how we will deal with a spill when the distillery is unoccupied (at night say).