Welcome to The Measurement Shop

Product Focus: Reed SW700 Heat Stress Stopwatch

SW700 Heat Stress Stopwatch

In this article we will be covering the SW700 heat stress stopwatch manufactured by Reed.

About the manufacturer:

Reed have been a leading Canadian supplier of high-quality measuring instruments and testing equipment since 2004. Whilst the company aims to produce products that cater to a wide variety of trade professionals including electricians, architects, carpenters and builders; many of Reed's products are used by professionals and hobbyists alike. Examples of products from Reed include: Thermometers, anemometers, clamp meters and sound measurement devices.


Reed's SW700 is a sleek, multi-functional device that measures temperature, humidity and calculates heat index and dew point. This premium stopwatch is solar powered, water-resistant (IPX4), features a 10-hour countdown timer, and built-in calendar that displays day, month and date. SW700 models combine air temperature and relative humidity measurement in an attempt to determine the human-perceived equivalent temperature.

  • Fitness coaches – Fitness coaches may use the SW700 to monitor heat levels of athletes during training.
  • Athletes – Athletes undergo rigorous training exercises that cause fluctuations in heat and body temperature. The SW700 can monitor the wearer's temperature to prevent heat sickness.
  • Gym users - Whilst designed for professional athletes, the SW700 stopwatch can be used recreationally by gym goers to prevent heat sickness caused by over-exercising.


  • 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.


  • Dimensions: 2.7 x 3.6 x 1.0" (68 x 92 x 23 mm).
  • Accuracy: ±3 seconds/day.
  • Resolution: 0.1°F/°C.
  • Temperature range: Temperature: 23 to 122°F (-5 to 50°C) Heat Index: 70 to 122°F (22 to 50°C).
  • Approvals: CE, IPX4.
  • Battery: CR2032 battery or Solar Panel.

Why buy this stopwatch?

  • The SW700 is solar powered and does not require battery option.
  • Constructed from durable materials for increased shelf life over other stopwatch models.
  • Highly accurate and able to calculate lap recall, lap split and lap counts.
  • Built-in heat index and monitoring for on-the-spot heat stress monitoring.
  • IPX4 waterproof and CE approvals.


This digital stopwatch is competitively priced and comes with a wide variety of features that make it perfect for use by athletes undergoing rigorous training.

Looking to purchase this product? Please visit the Reed SW700 heat stress stopwatch page.