Vibration meter is an instrument used to directly indicate the peak value, peak-to-peak value, average value or root mean square value of vibration quantities such as displacement, velocity, acceleration and acceleration derivative. The main parts of this instrument are integral and differential circuit, amplifier circuit, voltage detector and meter. The integral and differential circuit is used to complete the integral and differential operations between the above-mentioned vibration quantities. http://www.kmvibrationanalyzer.com/vibration-meter/