Chinese steel giant HBIS has developed converter sublance sensors probe TSC & TSO and have deployed them in 200 tonne converter of HBIS Tangsteel Hot Rolling Department, replacing imported sensors. The real time readings show that the success rate was over 98% in carbon, oxygen fixation and temperature measurement, which are all better than foreign equipment. This is a new breakthrough of HBIS for developing world class steel making sensors. Earlier Chinese steel mills were purchasing sublance sensors from foreign suppliers leads compatible and industry safety concerns. With its experiences in metallurgical temperature measurement sensors in the industry, HBIS teams developed the high precision sublance sensors. The team has made benchmarking to the international advanced level, through drawing design, material matching, welding and assembly process testing and process improvement, parameter correction, as well as more than 100 converter field testing, more than 2000 units of data comparison, finally developed of sublance sensor products with international advanced level. Converter sublance is one of major equipment in the dynamic control of converter automation system and the sublance technology could effectively improve the automatic operation of converters. The sublance sensors are injected into the hot metal to collect information and the data are transmitted to the dynamic model to analyze to eventually improve the control hitting rate.