This category encompasses measurement instruments specialized for vibration measurement and diagnosis of mechanical equipment in manufacturing environments. It includes vibration meters, vibration level meters, portable vibration analyzers, and vibration data loggers used for shaft vibration monitoring of rotating machinery, bearing abnormality detection, unbalance detection, and predictive maintenance. In equipment maintenance for processing machines, pumps, compressors, motors, and other machinery, these instruments monitor machine conditions by measuring vibration acceleration, velocity, and displacement to enable early detection of failure symptoms. Unlike sound level meters or acoustic analysis equipment, this category focuses on specialized instruments dedicated to measuring physical quantities of mechanical vibration.