Application: it is used to measure the temperature of molten steel and high temperature of molten metal. Features: 1.measure temperature accurately .error is less than ±1.5degree 2.fast response, short measure time, operational safety 3.use good materials, more using times, reduce costs 4.socket way: h type, o type, s type, z type 5.types of protect tube: straight poll paper tube, oblique poll paper tube, flame-resistant fiber tube, flame-resistant fiber casing pipe 6.types of protect cap:aluminum cap, iron cap, resin cap, paper cap 7.length of protect tube: 150mm, 300mm, 500mm, 700mm, 1000mm, 1200mm, 1 500mm