Smart Sensor AR926 Digital Tachometer rotation speed velocity meter

Description A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are increasingly common.   SPECIFICATIONS Measuring Range 2.5~99999RPM Rotating Speed Resolution 0.1RPM (2.5~999.9RPM) 1RPM (Over 1000RPM) Linear Rolling Speed Resolution — Measuring Distance 50mm~500mm Accuracy ±(0.05% 1 digits ) Sampling Time 0.8 sec(Over 60RPM) Max / Min Measuring √ Data Storage √ Memories Clear √ Range Selection Auto Battery Indication √