Effectively measure the speed of revolution and rotation of different objects with our extremely efficient Digital Tachometer. These are extensively utilized in automobiles, airplane and marine engineering for determining the speed of engines in a minute. The speed is measured by using infrared light and the number of frequencies changed in accordance to a set time, assist in determining the speed of the objects. These provide reliable results as well as give easy operation and effortless handling. The Digital Tachometer are hand held devices and their small size aid in their easier movement to the required location.