Abstract: A simultaneous multiple points sounding apparatus, comprising a plurality of weights to be suspended on burden charged in a furnace, a plurality of wire ropes attached to the weights with their one ends and extending at their other ends outside of the furnace, and a plurality of wire drums installed outside of the furnace on which the wire ropes are coiled, and a single driving device on which a plurality of wire drums are communicated, wherein the plurality of wire ropes are disposed on pulleys which travel downward when the respective weights reach the burden, thereby lessening the tension on the respective wire rope, and detectors are disposed for detecting the downward movement of the respective pulleys.