本发明公开了一种一体式密封型液态铅铋合金氧浓度传感器，主要包括信号单元、仪器支撑单元和核心测氧元件。核心测氧元件中装有参比电极的固体氧化物电解质陶瓷探头固定安装在保护钢套内，保护钢套与不锈钢支撑筒机械连接；而电极丝下端部分插入参比电极内，上端与信号快接头相连接，信号快接头通过连接导线与信号单元正极连接；不锈钢支撑筒上端由绝缘封头的不锈钢密封外接头螺纹机械密封，不锈钢密封外接头一端通过信号连接导线与电动势信号显示仪表负极连接，不锈钢密封外接头另一端接地。当氧浓度传感器的核心测氧元件插入待测的液态铅铋合金中时，信号单元直观获得电动势，根据电动势和氧浓度的关系式求解得到液态铅铋合金中的氧浓度。

The invention discloses an integrated sealed liquid lead-bismuth alloy oxygen concentration sensor, which mainly includes a signal unit, an instrument support unit and a core oxygen measuring element. The solid oxide electrolyte ceramic probe with reference electrode in the core oxygen measuring element is fixedly installed in the protective steel sleeve, which is mechanically connected with the stainless steel support cylinder; The lower end of the electrode wire is inserted into the reference electrode, the upper end is connected with the signal quick connector, and the signal quick connector is connected with the positive pole of the signal unit through the connecting wire; The upper end of the stainless steel support cylinder is mechanically sealed by the thread of the stainless steel sealed outer connector of the insulating head. One end of the stainless steel sealed outer connector is connected to the negative pole of the electromotive force signal display instrument through the signal connecting wire, and the other end of the stainless steel sealed outer connector is grounded. When the core oxygen measuring element of the oxygen concentration sensor is inserted into the liquid lead-bismuth alloy to be measured, the signal unit directly obtains the electromotive force, and the oxygen concentration in the liquid lead-bismuth alloy is obtained by solving the relationship between the electromotive force and the oxygen concentration.