Product Features:
The Tachometer is one of necessary instruments in mechanical field, and used to measure electrical machinery's rotational speed, the link speed or the frequency
It is Commonly used in electrical machinery, electric fan, papermaking, plastic, chemical fiber, washer, automobile, airplane, steamboat , manufacturing industries and so on
What is mostly commonly used is the hand-hold centrifugal tachometer
The Tachometer is essential in national economy's each domain
A tachometer (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 digital displays.

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 : yes
Data Storage :yes
Memories Clear :yes
Range Selection : Auto
Battery Indication :yes