JohninWV,
Alan recommended the SEC Millenium ethanol gas detector (sensor). The whole set up for my square footage if using one sensor with an audible and visual alarm could be done for roughly $2,500. This is estimated on approximately 1,800 square feet in the distillery proper and does not include the tasking room. I know it's a small area, but you would only need to add more sensors for a larger area. The alarms and lights are also available explosion proof, but the three alarm levels are all below an explosive level. There is also a controller that could be connected to your heat source to shut the still down automatically.
I’m no expert on any of this, but I'm sure Alan would be happy to speak with you about it. I hope this helps and it is definitely another tool for us to use in keeping our distillery safe.
Alan's contact information is as follows:
Alan H. Petersen Jr.
Sensor Electronics Corporation
5500 Lincoln Drive
Minneapolis, Minnesota 55436 USA
(T) 952.938.9486
(F) 952.938.9617
© 952.297.6336
www.sensorelectronic.com
Email: apetersen@sensorelectronic.com