A sensory meaning can be apprehended, in its ordinary instance, through the outward senses: an animal's body, water, glass, or the sun. Sensory perception includes more than sight; hearing and touch can also matter.
An intellectual or conceptual meaning is not itself an object of outward sense. Death, sleep, arrogance, publicizing a command, and the relation between successive events can be understood conceptually even when their effects are visible.
The classification concerns the meaning of the source and target—not the written form of their words. Water is sensory; transgression or arrogant excess is conceptual, even when attributed metaphorically to a flood.