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Stop Watch

This water resistant (IPX4) stopwatch features a 10 hours countdown timer and built-in calendar that displays day, month and date. The SW700 is battery and solar powered and has the ability to measure temperature, humidity, heat index and dew point. This stopwatch combines air temperature and relative humidity measurements in an attempt to determine the human-perceived equivalent temperature or “how hot it feels”.


  • Measures temperature and humidity, calculates heat index and dew point
  • Stopwatch/chronograph mode with 1/100 second resolution
  • Calendar mode displays day, month and date
  • 99 lap counter with 30 lap/split memory
  • Fastest/Slowest/Average lap recall
  • 10 hours countdown timer with audible beeper warning for the last 5 seconds
  • Programmable alarm
  • 12 or 24 hour clock operation
  • 48″ nylon lanyard
  • Backlit LCD display
  • Silent operation option
  • Battery and solar powered
SKU: SW700 Category:


Measuring Ranges Temperature: 23 to 122°F (-5 to 50°C)
Heat Index: 70 to 122°F (22 to 50°C)
Accuracy ±1.8°F (1.0°C)(32 to 104°F(0 to 40°C))
±3.6°F (2°C)
Resolution 0.1°F/°C
Measuring Range 1 to 99% RH
Accuracy ±5% RH (40% to 70%)
±8% RH (Other)
Resolution 0.1% RH
General Specifications
Timing Capacity 9 hrs, 59 mins, and 59 secs
Accuracy ±3 seconds/day
Lap Memory 30 laps
12 or 24 hour clock Yes
Time Alarm Yes
Display LCD
Backlit Display Yes
Power Supply CR2032 battery or Solar Panel
Battery Life Approx. 1000 hours (Alkaline)
Product Certifications CE, IPX4
Operating Temperature 14 to 140°F (-10 to 60°C)
Storage Temperature 14 to 140°F (-10 to 60°C)
Operating Humidity Range 0 to 99%
Dimensions 2.7 x 3.6 x 1.0″ (68 x 92 x 23 mm)
Weight 2.9oz (83g)


  • Heat Stress Stopwatch
  • Lanyard
  • Battery

Heat Stress

Sometimes we only use the air temperature as a measure of how comfortable we will feel when working or playing outside. But when the days get longer and the sun becomes stronger we need to take into account a lot more than air temperature.

Heat-induced illnesses, such as heat exhaustion and heat stroke occur when your body can’t keep itself cool. The evaporation of sweat is slowed on hot and humid days causing your body temperature to rise and become ill.

Symptoms of Heat Exhaustion and Heat Stroke

  • Dizziness, Headache, Weakness, Nausea
  • Rapid Heartbeat, Cramps, Chest Pain
  • Labored Breathing, Lack of Sweating
  • Mood changes such as irritability or confusion
  • High fever (104°F and Higher) for Heat Stroke Victims

Preventing Heat Stress

  • Know signs/symptoms of heat-related illnesses; monitor yourself and coworkers
  • Block out direct sun or other heat sources
  • Rest regularly
  • Drink lots of water; about 1 cup every 15 minutes
  • Wear lightweight, light colored, loose-fitting clothes
  • Avoid alcohol, caffeinated drinks, or heavy meals

And most importantly….Monitor the conditions you are in with a Heat Stress Meter
These meters measure how hot it REALLY feels outside when humidity is combined with temperature, air movement and radiant heat.

What is WBGT or Wet Bulb Globe Temperature?
WBGT index is a term used in industry, sports and other areas to indicate the heat stress level for humans and animals. It calculates the heat stress of direct sunlight, which takes into ac¬count temperature, humidity, wind speed, sun angle and cloud cover. This type of meter com¬bines these factors into a single number so you can quickly take into account the conditions you are in.

What is Black Globe Temperature (TG)?
Skin can burn when it comes in contact with exposed machinery, tools and containers left in hot direct sunlight. Black Globe Temperature represents the integrated effects of radiation and wind on these objects.


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