BioHazard,
I do agree with you regarding the FL series, but the setback is they don't offer panel mount for this one...
I guess I might go for the FL series and look for some custom method to attach them to the case.
Would be interesting to have someone measuring the flow of gas valves versus the other methods, though.
Thanks a lot for your suggestions, I will keep on looking for something and make a decision this week. Will tell you my final choice.
Sunwong