change gas sensor sensitivity

[eplanet]

hi friends
please see this attachment.
can i use potentiometer for change MQ4 sensitivity before transistor ?

 

[Hero999]

How are we supposed to know?

You've posted no schematic and no information about the gas sensor or any of the other components you plan to use.

 

[eplanet]

hi
if you read this post you will see i said MQ4(gas sensor)
and i want to know can i use potentiometer after output of this sensor for change sensitivity?
thanks

 

[Hero999]

if you read this post you will see i said MQ4(gas sensor)

I read your post. I just don't see why i should help you when you can't even be bothered to post the schematic and datasheet.