COMPOSITE PROBE FOR MOLTEN METAL

摘要

PURPOSE:To enable simultaneous transmission of a plurality of sensor signals by using multielectrode electric connector and a multiconductor cable which exist, by using plus or minus electrodes of sensors as a common lead and by connecting the sensors with the multielectrode electric connector. CONSTITUTION:A measuring electrode 3 is common for both an oxygen activity measuring sensor 2 and an Mn activity measuring sensor 13. Plus or minus electrodes of the sensors 2 and 13 of different kinds provided for measuring the amount and state of each constituent of a molten metal are used as a common lead and thereby these sensors 2 and 13 are connected with a multielectrode electric connector 10. Since one or a plurality of common leads serve also as leads of the plus or minus electrodes of the sensors 2 and 13 in this way, the number of connector pins of the connector 10 and the number of conductors of a cable can be reduced to those which are smaller than the double of the number of the sensors.