I got the IKEA air quality sensor, and it's always around 5-6 μg/m3, but my bane is cat hair. We have two cats and there's always hair in the air. Is there a filter that will remove those out of the air, and stop me breathing them all the time?
Almost any filter will handle cat hair. You probably want to find something with a washable pre-filter (usually a stretch fabric) so you don't waste the expensive actual filter.
If that's your only concern, a t-shirt over a box fan will probably do the job.
