A stopwatch is a handheld timepiece designed to measure the amount of time elapsed from a particular time – when it is activated – to the time when it is deactivated. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a stopclock. In manual timing, the clock is started and stopped by a person pressing a button. In fully automatic time, both starting and stopping are triggered automatically, by sensors.

Digital electronic stopwatches are available which, due to their crystal oscillator timing element, are much more accurate than mechanical timepieces. Because they contain a microchip, they often include date and time-of-day functions as well. Some may have a connector for external sensors, allowing the stopwatch to be triggered by external events, thus measuring elapsed time far more accurately than is possible by pressing the buttons with one’s finger.

Ltekonline are the manufacturers of Digital Stop Watch used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Measurement Lab Equipment for Engineering Teaching Lab in Universities