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Timer Counter, 79 mm, 66 mm, 21 mm


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Manufacturer Part No:
Newark Part No.:
Product Range
HeatWatch Series
Technical Datasheet:
HW30 CAL D   Datasheet
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Technical Docs (1)

Product Overview

The HW30 CAL D from Extech Instruments is a HeatWatch humidity/temperature stopwatch. This is a multi-function stopwatch displays a digital up/down timer, temperature, humidity and heat index. The heat index measurement shows how hot it feels when humidity is combined with the actual temperature. Ideal for use in hot weather conditions. Additional features include a 12/24hour clock, stopwatch, 30 lap/split memory and programmable alarm.
  • Calibrated with data HeatWatch humidity/temperature stopwatch
  • Stopwatch/chronograph mode with 1/100 second resolution
  • User adjustable heat index alarm
  • Fastest/slowest/average lap recall, 99lap counter with 30lap/split memory
  • 10hour countdown timer with audible beeper warning for the last 5 seconds
  • Programmable alarm
  • Calendar mode displays day, month and date
  • Accuracy of ±5 seconds/day
  • Heat index of 70 to 122°F (22 to 50°C), temperature 14 to 122°F (-10 to 50°C)
  • Humidity 1 to 99%, dimensions of 79mm x 66mm x 21mm, 85g weight


Test & Measurement


HW30 humidity/temperature HeatWatch comes with lanyard, Battery and operating instructions.

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