expendable thermocouple tips Application: Temperature Sensors for Molten Metal Wire:Pt-Rh/Wre Tip:604/602 Rapid-response type expendable thermocouple is used for measuring the temperature of molten metal.It has advantage of high accuracy,rapid reaction,reliability and stability. According the different thermocoupe wire,thermocouple has four type are S,R,B,C,D Type.