Thomas Scientific Traceable Stopwatch

The Thomas scientific traceable stopwatch is engineered for precise timing for academic, hospital, industrial, government and laboratory measurements. It is known for its accuracy and reliability that is backed by the National Institute of Standards and Technology. Interval splits mode, up to 10-hour recording, continuous timing, countdown timing, precision of 0.01 seconds and large display are notable features that come with this device.

Pros
Very reliable and accurate
Easy to use and handy
Splits mode
Wider application

Cons
Expensive