Is this considered an emitter, bubbler or mister ?
I would classify it as an emitter.
It is a microspray nozzle, so it is a mister. IMO, emitters drip.
@Rightbundle, I agree with @febiii. This mister outputs up to 24 GPH; pending the area of coverage, you could calculate the precipitation rate using the equation in this support article.
Hope this helps