Thanks for that link Mike Meierle. The one pic you pointed out led me
goggling the ASTM spec and the certified fluid. The ASTM spec is simply a
test procedure. Not worth reading at this point without a viable fluid. If
repeatability is important it may be helpful in the future.
After filtering through all the bs, and if you eliminate all citations to
any form of alcohol, some likely candidates are:
Stoddard Solvent
N-Heptane
Heptane
Viscor 120B
Viscor 16A & 16B
ANSU's proprietary fluid
Exsol D-40
Indolene (best match to gas)
Rock Valley's Viscor 1482 AW2 (calibrating fluid)
I find it interesting Stoddard was mentioned frequently even though it is
still flammable. (One posting said to use a explosion proof enclosure). But
in all likely hood it appears a Chemical Company called Rock Valley makes
various calibrating fluids. I have signed up (it takes 24 hrs) to get an
MSDS. I'll post what I find out.
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