Clarify ATF; and avoid acronyms and jargon.  (Automatic transmission fluid, alcohol tobacco and firearms, etc.).  Are you looking for ambient air, process gas or process liquid applications?

Del Mar Scientific, Galvanic and Houston Atlas (or their name of the week) sell paper tape analyzers suitable for gas.  The tape analyzers use lots of consumables.

chillboy,

What information are you looking for? Or are you asking for recommendation of online h2s analyzers that members have used?

See if the analyzer at this site meets your needs.

http://asiwebpage.com/product/prodpdf/Analyzer%20205.pdf

Dear Members!

I understand the difficulty caused by the acronym ATF.

To get more members to put their valuable advice, I wish to reframe my requirement as

" I need info on Online Analysers to check presence of Hydrogen sulphide in Aviation Turbine Fuel, which is a liquid stream."

ATF is Aviation Turbine Fuel, a cut from the kerosene stream, desulphurised and distilled to meet endpoints.

Thanks to JL Seagull and Ashereng for your response and I may put up the status a little later. Further inputs are always welcome from members who have used such online analysers.
Thanks for everything,
Chillboy