铁谱分析是一种借助磁力将油液中的金属颗粒分离出来，并对这些颗粒进行分析的技术。铁谱分析仪主要有两种类型：一种是直读铁谱仪，一种是分析铁谱仪，其中分析铁谱仪又可分为直线式铁谱仪和旋转式铁谱仪两种。直读铁谱仪依据颗粒的沉积位置不同，将磨损颗粒大致区分为大颗粒和小颗粒，其读数分别以Dl和Ds表示，但这种区分缺乏严格的物理意义，如果实验数量多，其趋势线可以反映零件磨损的变化
Ferrography is a use of magnetic metal particles in the oil separated and analyzed the technology of these particles. There are two main types of Ferrography analyzer: one is direct reading ferrography, the other is analytical ferrography, which can be divided into linear Ferrography and rotary ferrography. Direct reading Ferrograph different deposition location on the basis of particle, wear particles will be divided into large and small particles, which were represented by Dl and Ds readings, but this distinction is lack of strict physical significance, if the number of the trend line can reflect the change of wear