Triplett HSW50-NIST Heat Stress/Index Wet Bulb Globe Temperature Stopwatch with Certificate of Traceability to N.I.S.T
- Professional 3-line clear display for stopwatch, time, and calendar
- WBGT (Wet-Bulb Globe Temperature) monitoring with level indicators
- 1/100-second stopwatch measures up to 10 hours
- Lap and Split Time Recording stores up to 100 laps
- Fastest, slowest, and average lap records tracking

The Triplett HSW50 Heat Stress Stopwatch is ideal for monitoring WBGT levels in hot environments for worker safety, sports, and outdoor activities. It features a 3-line clear display for stopwatch, time, and calendar, WBGT (Wet-Bulb Globe Temperature) monitoring with alert, 1/100-second stopwatch that measures up to 10 hours, Lap and Split Time Recording with fastest/slowest/average lap record tracking, and 2-interval countdown timer repeatable up to 999 times. Additional functions include Stroke Frequency Counter for pace tracking adjustable between 10 to 320 paces, settable daily alarm, and auto-off LCD display to save the battery. Water resistant for outdoor and sports use. Includes Lanyard and CR2450 battery.
HSW50-NIST Comes with Certificate of traceability to NIST standards.
Triplett HSW50 Heat Stress Stopwatch Features
- Professional 3-line display: Offers at-a-glance visibility of stopwatch, time, and calendar for easy access to crucial information.
- WBGT monitoring: Monitors Wet-Bulb Globe Temperature levels to ensure worker safety and optimal performance in heat.
- 1/100-second stopwatch: Measures elapsed time with precision, supporting activities and events lasting up to 10 hours.
- Lap and Split Time Recording: Stores up to 100 laps, allowing you to track performance over time and improve personal bests.
- Lap record tracking: Fastest, slowest, and average lap records are easily accessed, helping athletes and coaches analyze performance effectively.
- 2-interval countdown timer: Repeatable up to 999 times, perfect for training sessions requiring multiple intervals.
- Stroke Frequency Counter: Enables pace tracking, keeping you focused on maintaining optimum workout intensity.
- Pacer Function: Adjustable between 10 to 320 paces, tailored to individual pace requirements and training goals.
- Daily alarm & WBGT alert: Enhances safety with alerts for high temperatures, ensuring proactive measures can be taken.
- Auto-off LCD: Saves battery life when the device is not in use, prolonging operational time during important events.
- Includes Lanyard and Battery: Convenient carrying option and ready-to-use with included CR2450 battery.
Triplett HSW50 Detailed Specifications
| Display | 3-line clear display |
| WBGT Monitoring | Yes, with alert |
| Stopwatch Precision | 1/100-seconds, measures up to 10 hours |
| Lap Recording | Up to 100 laps |
| Countdown Timer | 2-interval, repeatable up to 999 times |
| Stroke Frequency Counter | Yes, adjustable from 10 to 320 paces |
| Daily Alarm | Settable alarm |
| Battery Saving Feature | Auto-off LCD display |
| Water Resistance | Yes, suitable for outdoor use |
| Included Accessories | Lanyard and CR2450 battery |
| NIST Certification | Yes, HSW50-NIST version available |





