An atomic clock - which measures the frequency with which atoms move in and out of excited states.
The sundial
Timepieces.
In the past, a common time measuring instrument was the sundial. Today, the usual measuring instruments for time are clocks and watches. For highly accurate measurement of time an atomic clock is used. Stop watches are also used to measure time in some sports.
You would possibly use a chronometer which is an extrememely accurate clock.You would possibly use a chronometer, a very accurate clock.
You can measure kilometres in metres, which would be 1000, or decametres, that would be 100, or in hectometres, that's 10. You could even measure in decimetres
A clock...
The sundial
Timepieces.
odometer
Do you mean like a watch?
An accelerometer is an instrument to measure acceleration, which is the change in velocity per unit of time.
it is an ancient instrument used to measure time.
CLOCK
The traditional instrument used to measure the time of a given run is the stopwatch.
Unit for time is a second.There are various instruments to measure temperature: a thermometer, a thermocouple are two.
A compass is a scientific instrument used to locate the north magnetic pole. The magnetic changes in the Earth's core make the north magnetic pole move over time.
watches kind of like compasses!