I was looking at PF's baseline arcanist spell that grants a direct Blindsight capability to a Wiz/Sorc. That spell is
Echolocation. It's a nice spell - 40' Blindsight radius and a 10 Minute/Level duration ... Extend-friendly and good for multi-encounter goodness. But Holy Cow ... it's 5th Level!
http://www.d20pfsrd.com/magic/all-spells/e/echolocationOf all the extraordinary senses out there (Tremorsense, Scent, Blindsense, etc.), Blindsight is really the most ideal for an arcanist who wants to do additionally vile things to enemies already caught up in his Darkness, Solid Fog, Sleet Storm spells.
Are there any other spells (not magic items) that grant Blindsight to a Wiz/Sorc?Listening Lorecall used to be in CAdv, but the SpC took it away from them. The awesome Dragonsight spell grants Blindsense, but that ain't as good. Kingdoms of Kalamar gives you a 3rd level spell called Ranged Blindsight, but good luck getting that approved by some DM's. So I'm curious too, if you think that Echolocation is properly assigned as a 5th level spell. I would call it a 4th level spell. And I'd even take a hit on knocking down the radius to 30' in order to do that.