When regular devices can not get to far sufficient or work quick enough, Mighty Probe is the device for the task
https://zanderxzpn281.inkharbory.com/posts/exactly-how-to-locate-a-septic-tank-near-the-house-with-a-mighty-probe
When ordinary tools can not reach much sufficient or function quick enough, Mighty Probe is the tool for the task, providing you the deepness, speed, and control required to obtain it done.