Using thermoelectricity of B4C, Japan and Germany sintering was measured 2200 thermocouple, used in high temperature measurement and control Its high thermoelectricity and stability make it can reliably for a long time to use boron carbide thermocouple/graphite by graphite tube boron carbide rods and boron nitride between bushing In the inert gases and vacuum, the use of temperature up to 2200 The potential difference has a good linear relationship with temperature between 600 and 2200.