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Hw30 W/Limited Nist - Time Function Only


Price starts at $119.99

Product Code : HW30-NISTL

Manufacturer : Extech

NIST Certificate:

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Extech HW30 Humidity/Thermometer Stopwatch


  • User settable Heat Index alarm
  • Stopwatch/chronograph mode with 1/100 second resolution
  • Fastest/Slowest/Average Lap recall
  • 99 lap counter with 30 lap/split memory
  • 10 hour countdown timer with audible beeper warning for the last 5 seconds
  • Programmable alarm
  • Calendar mode displays day, month, and date


Digital UP/DOWN timer displays Temperature, Humidity, and Heat Index. Careful use of this item will provide years of reliable service.


General Specifications
Accuracy (Watch) ñ5 seconds/24 hours
Accuracy (RH) ñ5% (33 to 75% RH), ñ7% (1 to 32% and 76 to 99%)
Accuracy (Temp) ñ3øF
Temperature 14 to 122øF (-10 to 50øC)
Resolution 0.1/ 1 o C or F
Update Rate 5 seconds in Heat Index Mode, 2 minutes in other modes
Heat Index 70 to 122øF (22 to 50øC)
Humidity 1 to 99% RH
Memory 30 Laps/ 30 Splits
LAP Counter 99 Laps
Battery CR2032
Dimensions 3.1x2.6x0.8" (79x66x23mm)
Weight 3 oz. (85g) with battery


NIST Certificate Included.
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