A monitoring system such as a septic tank monitoring system for
distinguishing between and identifying the location of a sedimentary
layer, a scum layer, and any intervening liquid zone in a septic tank with
an elongate sensing probe for being disposed in the septic tank, a
plurality of sensors disposed along the sensing probe, and a remote
monitor operably associated with the plurality of sensors, such as
thermistors, for providing a remote indication to a septic tank operator
of the location of the sedimentary layer, the scum layer, and any
intervening liquid zone in the septic tank based on the signals from the
plurality of sensors so that a septic tank operator can monitor the
contents and condition of the septic tank without a need for excavating
and physically inspecting the septic tank.