When regular tools can not reach far sufficient or work quickly enough, Mighty Probe is the device for the job

https://gunnercouv727.quantlynix.com/posts/just-how-to-locate-a-septic-tank-with-a-mighty-probe-before-acquiring-a-home

When normal devices can not reach much enough or work quick enough, Mighty Probe is the device for the work, giving you the deepness, speed, and control required to obtain it done.