Thank you for your further explanation, and for the specifications. If the O2 sensors are to be mounted above the tanks, and not inside it where the gases are, then it should work. But I am still not clear as to the purpose of the O2 sensors. Our sensors are O2 depletion monitors for safety, and it does not appear that there will be any personnel where the O2 sensors are. This could be for Oxygen enrichment instead, and the sensors will still work along the 0-25% by volume range. I am just concerned that they are called "O2 Analyzers" on the spec sheets. Our sensors are O2 leak detectors only, not analyzers. But the occasional presence of the gases Styrene or Methyl Methacrylate should not hamper the O2 sensors from detecting Oxygen, either in enrichment or depletion mode. So I think we can offer a quote. But I'm still not clear why the O2 sensors are needed.