Item Total = $0.00 
Items = 0 
View Cart
United States
1-800-358-5525 or 
log in or register

Extech Humidity/Thermometer/Heat Index Stopwatch

Extech  |   Mfr# HW30  |   Item# DO-94410-70

$44.99 USD/EACH

Do you qualify for a better price? Log in now!

Are you a reseller or buying in bulk? Call us today.

  • 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 memeory
  • 10 hour countdown timer with audible beeper warning for the last 5 seconds
  • Programmable alarm
  • Calendar mode displays day, month and date
  • 12 or 24 hour clock operation
  • 39" lanyard and battery included
Timing capacity 9 hours, 59 minutes, 59 seconds
Product Type Stopwatches
Display LCD,0.75 in H
Count direction Up
Clock 12 or 24 hour
Alarm Yes
Resolution 0.01 seconds
Power 3 V button cell battery (included)
Timing modes Single-event, lap, cumulative split
Temp range 14 to 122°F (-10 to 50°C)
Model HW30
Qty/ea 1
Dimensions 2.6 in W x 3.1 in H x 0.8 in D (66 x 79 x 21mm)
Manufacturer number HW30
Brand Extech
Accuracy ±5 seconds/day


at $140.00 USD/EACH
Usually ships in 8 days.

Technical Resources
Service & Support
Still have questions
Contact Our Experts
for FREE product
application selection
and support.
or call 1-800-358-5525
Custom Ordering Solutions
Custom Ordering Solutions
Let us find the exact product you need. We have access to suppliers full lines - for products beyond what you see here. Call 1-800-358-5525
Questions and Answers
Product Reviews


by PowerReviews

(based on 1 review)

Reviewed by 1 customer

Displaying review 1

Back to top


very good device

By no nick name

from Bluefield, WV

Verified Reviewer



      Best Uses

        The men that uses this device works out in the hot weather wearing rubber gloves and sleeves when working on energized conductors. so it helps to keep an watch on the heat. so not want the employees to get over heated.

        • Was this a gift?:
        • No

        Displaying review 1

        Back to top