Triplett HSW50-NIST Combination Heat Stress Stopwatch

Features

• 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
• 2-interval countdown timer repeatable up to 999 times
• Stroke Frequency Counter for pace tracking
• Pacer Function adjustable between 10 to 320 paces
• Safety monitoring daily alarm & WBGT temperature alert
• Auto-off LCD display to save battery

Specifications

• Temperature Range: 23 to 122F (-5 to 50F)
• WGBT Range: 50 to 122F (10 to 50F)
• Accuracy: ±1%
• Resolution: 1F/C
• Humidity Range: 1 to 99% RH
• Accuracy: ±5%
• Resolution: 1% RH
• Hour Format: 12 or 24 hour
• Calendar Format: day-month or month-day

Overview

The Triplett HSW50 Heat Stress Stopwatch is designed for monitoring WBGT (Wet-Bulb Globe Temperature) in hot conditions, making it ideal for workplace safety, athletics, and outdoor activities. It features a clear 3-line display that shows stopwatch, time, and calendar functions, along with WBGT alerts. The stopwatch offers 1/100-second precision and can measure up to 10 hours, with Lap and Split Time recording that tracks fastest, slowest, and average laps. A dual-interval countdown timer can be repeated up to 999 times. Additional capabilities include a Stroke Frequency Counter for pace monitoring (adjustable from 10 to 320 strokes), a programmable daily alarm, and an auto-off LCD to conserve battery life. Built to be water resistant, it’s well-suited for outdoor and sports use.

What's in the Box

• HSW50-NIST Stopwatch
• Lanyard and CR2450 battery
• Certificate of traceability to NIST