Ok, everything is hooked up. The relay is hooked up to the arduino. It's on a timer as well.
In the future the timer would be integrated with the arduino.
The current reading is 11.57ppm.
I'll try to make another, thinner silicone membrane. I'll throw it in the oven this time (150F). I hear silicone cures faster in heat. The wax might melt on the silicone but I can remove it with a paper towel and an iron.
Last edited by mistergreen; 12-06-2012 at 04:25 AM.