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A stopwatch is a timepiece designed to measure the amount of time that elapses between its activation and deactivation. A large digital version of a stopwatch designed for viewing at a distance, as in a sports stadium, is called a stop clock .
A simple mechanical watch, without the stopwatch functionality, can be certified a chronometer, as can a clock, for example a ship's clock, used for navigation. The terms are not mutually exclusive either, for instance the Omega Seamaster 300M Chronograph GMT Co-Axial is also a COSC certified chronometer [21]
The term chronometer is often wrongly used by the general public to refer to timekeeping instruments fitted with an additional mechanism that may be set in motion by pushbuttons to enable measurement of the duration of an event. Such an instrument, typically called a stopwatch, is in fact a chronograph or chronoscope. It may be chronometer ...
Chronograph, with a second hand that can be stopped and started to function as a stopwatch. Double chronograph or rattrapante, multiple second hands for split-second, lap timing or timing multiple events; Flyback chronograph, allowing rapid reset of the chronograph as it is running; Counter chronograph; Independent second-hand chronograph
Among the many people who attempted to claim the prize was the Yorkshire clockmaker Jeremy Thacker, who first used the term chronometer in a pamphlet published in 1714. [152] Huygens built the first sea clock, designed to remain horizontal aboard a moving ship, but that stopped working if the ship moved suddenly. [152] Harrison's H4 chronometer
chronometer or clock: time clap-o-meter: volume of applause compass: direction of North Coulombmeter: electrostatic charge of a material colorimeter: color creepmeter: slow surface displacement of an active geologic fault in the Earth corrator: corrosion rate declinometer: magnetic declination: densimeter: specific gravity of liquids densitometer
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A clock or chronometer is a device that measures and displays time. The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month, and the year. Devices operating on several physical processes have been used over the millennia.