Specialized measuring instruments for precision measurement of vibration, shock, and acceleration of machinery and equipment in manufacturing sites. Used for vibration analysis of processing machines, operation monitoring of conveying devices, and seismic resistance evaluation of products. Classified by measurement principles including piezoelectric, capacitive, and strain gauge types, supporting 1-axis to 3-axis measurement with analog/digital output and data logger functionality. Essential for early detection of abnormal vibrations in equipment maintenance, product impact testing in quality control, and positioning accuracy improvement in automated lines. Clearly distinguished from other mechanical quantity measuring instruments (load cells, pressure gauges, torque meters) by specializing in acceleration and vibration measurement.