润滑油中的微量铁磁性颗粒反映了润滑部位各运动部件磨损的状况，是机械设备磨损工况监测的重要检测对象，对微量铁磁性颗粒进行定量检测的传感器是研制该类检测仪器的关键，本文研究一种可用于对微量铁磁性颗粒进行定量检测的传感器，文中对该种传感器进行了理论分析，并介绍了工艺参数和性能指标。 The tiny amount of ferromagnetic particles in the lubricating oil reflects the wear status of the moving parts in the lubricating part and is an important object for monitoring the wear condition of the mechanical equipment. The sensor for quantitatively detecting trace amounts of ferromagnetic particles is the key to the development of this type of testing equipment. In this paper, a kind of sensor that can be used for the quantitative detection of trace ferromagnetic particles is studied. In this paper, the sensor is analyzed theoretically, and the process parameters and performance indexes are introduced.