Sublance probes used in BOF with sublance system employ combinations of measurement techniques in a single sensor, such as temperature, carbon via thermal analysis, oxygen activity, and solid chemical sample retrieval .The use of M-TSC and M-TSO sublance probes can accurately control steel making process and end point. Sublance technology can realize automatically steel-making,shorten tap-to-tap times and enhance the hit rate of end-point temperature and carbon content.