We know that having a good heat stress plan for athletes significantly reduces the incidence of exertional heat illness (EHI) and the risk of death from heat stroke. One of the foundational elements of almost all heat stress plans is measuring the wet bulb globe temperature (WBGT) with a heat stress monitor. There are several heat stress meters that measure WBGT on the market. Which one should you use? The answer to that question is a big “it depends”. I will break down various options for you, depending on your specific needs.
Choosing the correct device is determined by a few different things. First thing is accuracy/precision. Does the use case require scientific levels of accuracy and precision? If so you are going to need to shell out a lot of cash and be trained in how to use the instruments. Or can you be within a degree or two for it to be acceptable (most use cases). Second, where are you using the device? Are you using it inside or outside? One thing to note is that the type of ground surface has no significant impact on the wet bulb globe temperature. Another question you need to ask is how much manpower can I dedicate to obtaining a WBGT reading? If you use your own instrument, you must spend at least 15 minutes every day to achieve an accurate WBGT reading compared to the Zelus WBGT system, which is instantaneous. Finally, how much money do you have available? Devices that give accurate WBGT readings can range from tens of thousands of dollars annually to just a few dollars a month.
This list is my personal opinion and is not an exhaustive list of all devices. Each use case is unique and requires careful consideration when choosing a WBGT monitor. Also I make no claims about the accuracy of any of the listed devices.
Uses:
Scientific or Meteorological Uses and Money Is No Object
If you need to perform a task that requires high precision and accuracy, you will want to build your own device. You should purchase all three thermometers separately from a reputable source, such as Campbell Scientific. Plan on spending well over $10,000 and also have the time and knowledge to maintain the equipment.
Scientific Field Work
Do you need something that is reasonably accurate, portable, and won’t break the bank? The device to use would be the QUESTemp 34. The QUESTemp series has been proven to be the most accurate portable monitor on the market. It will cost you between $3,000 and $5,000 and requires considerable maintenance. However, if you want accurate results for your research, this is the device you should consider.
Athletes That Play Outside
For most clubs, high school, middle school, and college athletics, the Zelus WBGT system is the best option. Zelus WBGT utilizes real-time, hyperlocal weather data and processes it through complex algorithms to provide the user with an accurate WBGT reading. But why is it the BEST option? Zelus WBGT system gives instant and accurate readings. It requires no user maintenance. It is not affected by insolation error (hot car error). It’s on your phone, so you’ll never forget the device. Additionally, users can obtain the WBGT at any location; they are not required to be on-site.
Outdoor Manual Labor
For individuals working outdoors, such as groundskeepers, construction workers, or farmers, I recommend the Zelus WBGT system for obtaining wet bulb globe temperature readings. The accuracy, simplicity of use, and ability to obtain instant readings, rather than waiting 15 minutes for the device to equilibrate, save employers time and money.
Indoor Use
Occasionally, you will need to have an indoor WBGT reading. Indoor WBGT readings are usually needed only in industrial settings. A large employer should either have someone on staff or hire a consultant to determine which device is best for their particular use case. There are many different options and depending on what is required will determine the equipment needed to measure heat stress.
Conclusion:
For most applications, the Zelus WBGT system is the best option for obtaining and recording WBGT readings.
Until next time, stay cool!😎
