Portable Oil Steel Dust checker SDM-73 Features •Enables diagnosis of the wear condition of bearings before an increase in vibration. •Simple operation - simply place the grease sample. •Simple diagnosis and trend monitoring of the wear condition of greased bearings, gears, etc. •Pre-diagnosis for Ferrography method and SOAP method. *1 Battery life may vary with ambient conditions, conditions of use, storage period, battery manufacturers, etc.