Tobirama is the best sensor.

[FemmeFatale]

Nope , I remember what you said about Sakura. Karin, Mito, Katsuyu, and Naruto all solos him

 

[Tobby17]

Tobirama can tell what clan you are based on your chakra, that puts him up there imo

 

[Minator93]

Tobirama w/out a doubt. He's the only one apart from Hashirama to sense that Oro's body is made up of Zetsu/Hahsirama's cells.

He also sensed Karin's heritage in an instant.

Tobirama soloes. Haters gonna hate.

 

[Bogard]

Tobirama can tell what clan you are based on your chakra, that puts him up there imo

Many sensors have shown to be capable to do that. Muu for example did the same thing during this war by noticing chakras coming from different villages and knowing they formed an alliance based on that alone, just like he noticed a similar chakra pattern between Gaara and his dad