I need some sort of a sensor that can tell me whether LPG/Oxygen is flowing inside 8mm tube

[shailisason]

Hi,

I need some sort of a low voltage sensor that can tell me whether LPG/Oxygen is flowing inside 8mm tube
I want to connect the sensor to my computer, and to get signal whether natural GAS/LPG/Oxygen/AIR is flowing OR not flowing inside 8mm tube.
NOT FOR WATER
Ther is no need to know the flow rate, Only If its flowing (there is air supply = ON) or not flowing(there is no air supply=OFF)
Im a student so If u can add Some details or any kind of guidance I Will be thankful!

 

[gruntguru]

Link

je suis charlie

 

[shailisason]

thank you, but I cant fined for LPG/Oxygen (I think its only for water) ... can you post a link to the right product?

 

[gruntguru]

Link?

je suis charlie