Druid Menhir Savant and Spirit Sense

[Vaniglio]

Hi,
Can I keep active spirit sense always? I must do concentration check to keep this ability up?
TY

[Snowblind]

It's an at will spell like ability with a duration of concentration up to 1 min/level.

Nothing stops you from walking around using your standard action to maintain concentration, and just recasting the SLA when the 1 min/level time runs out.