... ISO9001 Type:R and S Theory:To test temperature and oxygen Oxygen Probe(TOS)is used in open-hearth furnace,converter and ... steels,the scene of temperature and oxygen activity measures.The key part of oxygen probe is oxygen half-ceel,which is researched and ... ,) Range: 1450~1750°C B,) Tolerance: 3°CC,) Measuring Time: <4sOxygen activity measuring:A,) Range: 1~1000ppmB,) Tolerance: >150ppm, 5ppm<20ppm, 0 ...