NJW233-Heat Stress Stop Watch with ISO Certificate

• Measures temperature and humidity, and calculates heat index as well as dew point
• Combines air temperature and relative humidity measurements in an attempt to determine the human-perceived equivalent temperature or "how hot it feels"
• Calendar mode displays day, date and time
• Stopwatch/chronograph mode with 1/100 second resolution
• Fastest/Slowest/Average Lap recall
• 99 lap counter with 30 lap/split memory
• 10 hour countdown timer with audible beeper warning for the last 5 seconds
• 12 or 24 hour clock operation
• Full LCD display with LED backlight
• Silent operation option
• Dual power: solar panel and battery
• 1 ATM water resistant (IPX4 rated)

Specifications

• Air Temperature Range: -5 to 50°C (23 to 122°F)
• Humidity Range: 1% - 99% RH

Additional Specifications

• Lap Memory: 30 laps
• Heat Index Range: 70 to 122°F (22 to 50°C)
• Temperature Range: 23 to 122°F (-5 to 50°C)
• Humidity Range: 1 to 99% RH
• Dimensions: 1 to 99% RH
• Weight: 2.93 oz (83 g)