Vibration Meter “ACO VIBRO TYPE 3116” is super mini-size like a cellular phone. It offers, just like a “machinery doctor”, high precision monitoring of various industrial machinery by using the optional headphone or auscultation stick. It offers a simple way of making medical chart for your machine. The “data hold” function has highly promoted the easy observation of the numerical data. In addition, maintenance or examination of the existing machine, or experiment for a new facility under development, has been greatly promoted by fixing and numbering the measuring points on a large-scale target machinery, or by improving the mobility of the measurement based on the “single point” scheme stated above.