Screens you don't feel. Air cleaners you do. (this picture is not my carb and screens but you get the idea). I don't think you can get anything through these that would hurt the engine?
These are about the least restrictive you can make or find yet have a 20% area loss.(maybe more, I haven't looked at that chart in quite a while)
What flow loss that translates into, don't know?
Let the PE's here duke that out. I'm not.
What's good about this screen though is it is not fine enough to risk a collapse like the oil pump screen COULD.
I'm not being too obtuse now am I? Wouldn't want to get thrown into "solitary". (That wasn't "solidary" was It?)
OH! @ Mike TS, that sensor you are referring to is most likely an air temperature sensor. The computer likes to know what the air temperature is of what the engine is taking in. That's it I believe?
