Standard thermometers measure the actual temperature, but not the heat index - how hot it feels
taking humidity into account. The Ultrak
830 Heat Index Stopwatch accurately measures heat index - as well as having full stopwatch functionality - to get the most accurate temperature measurement possible.
Provides accurate readings of: Temperature, humidity, heat index and dew point.
30 dual split recallable memory.
Tracks up to 10 hours and to the 1/100th of a second.
Programmable countdown timers.
Auto repeat functionality.
Time and calendar functionality.
powered, but also a Lithium battery backup power source.