Two separate cylinders have H2S (1000 ppm) and CO2 pure. Mixing ratios doesnt matter. They both are separately controlled using MFC.
I dealt with this problem in animal husbandry are not dangerous concentrations of H2S
Do you mean to say that the concentration that i use in not dangerous?
Exposing yourself to H2S above about 10PPM is not recommended and above 100ppm is dangerous to life and health. Also is heavier than air and highly flammable.
Please seek professional guidance. See the US guidelines for H2S handling.
https://www.osha.gov/Publications/hydrogen_sulfide.html
http://www.cdc.gov/niosh/npg/npgd0337.html
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