Within the high‑temperature zones of a steel reheating furnace, the temperature range transmitter monitors the thermal profile of the exiting slab. Mounted on the furnace exhaust pipe, it converts the sensed temperature into a calibrated signal that feeds the plant’s distributed control system. Operators rely on that signal to fine‑tune burner fuel flow, keeping the slab temperature within the narrow band required for downstream rolling. By providing a continuous, real‑time indication of heat levels, the transmitter helps avoid both under‑heating, which would increase energy consumption, and overheating, which can cause scale defects. The same device is frequently installed on the hot‑roll stand of a rolling mill, where it tracks the temperature of the workpiece between successive passes. In that context the transmitter’s feedback allows the drive to adjust roll speed and cooling water flow, preserving surface quality and reducing wear on the rolls. The result is a smoother production line that meets tight steel‑grade specifications.