Temperature Measurement with the Expendable Immersion Thermocouple

The expendable immersion thermocouple, developed by Leeds and Northrup to give greater accuracy, speed and convenience in the measurement of molten metal temperatures, has now been in use in a number of steelworks for some time. It has also begun to find a place in the melting of non-ferrous metals. This article surveys the results of experiences so far obtained in replacing the conventional platinum rhodium-platinum immersion thermocouple with the expendable cartridge type.