Extech HW30 HeatWatch Humidity Stopwatch
The Extech HW30 HeatWatch Humidity Stopwatch combines accurate timing with environmental monitoring in one compact handheld unit. It measures temperature, relative humidity and heat index while also working as a full-function stopwatch. This makes it ideal for sports coaching, outdoor work and science activities.
In addition, the stopwatch stores up to 30 lap or split readings for later review. Users can quickly recall the fastest, slowest and average times during training sessions. The large backlit display also keeps readings clear in low light conditions.
Designed for Safety and Timing
The Extech HW30 HeatWatch Humidity Stopwatch updates temperature and humidity readings every five seconds. It then calculates the heat index to show how hot conditions really feel. A programmable alarm warns users when preset heat limits are reached, helping reduce the risk of heat stress.
Alongside its environmental functions, the unit offers a countdown timer with a ten-hour range and a standard clock with calendar display. The lightweight ABS housing is easy to carry and resists everyday knocks. A supplied lanyard keeps the stopwatch close at hand.
Simple to Use Anywhere
Because of its simple four-button layout, the Extech HW30 HeatWatch Humidity Stopwatch is quick to set up and easy to operate. The clear digital screen and compact design make it suitable for both indoor and outdoor use. Battery power is included so the unit is ready to use straight from the box.
Two different set types are available to suit different requirements. Whether monitoring heat conditions during training or recording lap times during field work, the Extech HW30 HeatWatch Humidity Stopwatch provides reliable performance in a portable format.
Key Features
- Combines stopwatch and environmental monitoring functions
- Calculates heat index from live conditions
- Programmable audible warning for high heat levels
- Stores up to 30 lap and split records
- Recalls fastest, slowest and average lap times
- Large backlit LCD for easy reading
- Simple four-button control layout
- Includes a ten-hour countdown timer
- Displays both time and calendar information
- Lightweight ABS construction for daily use
- Supplied with a carry lanyard
- Battery fitted for immediate operation
- Suitable for sport, education and site work
- Two different set types are available
Technical Specifications
| Product type | Humidity and temperature stopwatch with heat index monitoring |
| Manufacturer | Extech |
| Manufacturer part code | HW30 |
| Stopwatch timing capacity | 9 hours 59 minutes 59 seconds |
| Lap memory | 30 records |
| Countdown timer range | 10 hours |
| Clock format | 12 hour or 24 hour display |
| Calendar | Day and date display |
| Temperature range | -10°C to 50°C (14°F to 122°F) |
| Relative humidity range | 1% to 99% RH |
| Heat index range | 22°C to 50°C (70°F to 122°F) |
| Reading update rate | Every 5 seconds |
| Timing accuracy | ±5 seconds per day |
| Display | Large backlit digital LCD |
| Alarm | Programmable audible alert |
| Lap recall modes | Fastest, slowest and average |
| Power supply | 1 x CR2032 battery included |
| Dimensions | 79 x 66 x 21 mm |
| Weight | 85 g |
| Accessories supplied | Lanyard and operating instructions |
| Warranty | Not specified |
Document Downloads
What’s Included
- Extech HW30 HeatWatch Humidity Stopwatch
- 39 inch (1 m) lanyard
- 1 x CR2032 battery
- Operating instructions