Minato needs to put his finger on the ground in order to effectively sense people (without KCM). Sasuke, juugu & suigetsu all sensed naruto's chakra as well..
Yes, he is one of the greatest sensors in Narutoverse, his sensory is advanced than most sensors. And that is one of his feats that make him a wonderful user of his FTG. He can sense exactly where the enemy is, whether an enemy is approaching him and a lot more.
correction he can effectevely sensed people without kcm
since the chakra he sensed was without kcm he sensed both naruto and kurama cooperating
while the sensores only felt the fierce chakra of kurama