'Pixel' is just Husqvarna's term for narrow kerf (NK) chain. Oregon sometimes refers to this as 'Micro-Lite'. Carlton (also branded as 'WoodlandPro' at Bailey's) also makes it. STIHL does not (currently) offer any.
NK chains should be run on NK bars. Available in 3/8 low profile and .325 pitches.
*Husqvarna uses different file guides for their .325 and.325 NK chains*. The roller guides do not work on all chains, or may need to be modified to fit others.
Philbert