Zelus app provides free WBGT

Zelus app will provide WBGT readings at your device's location for free.

Check WBGT anywhere in the world with a touch of the button

Zelus app will allow you to check the WBGT anywhere in the world. You are no longer required to be on site to get a location's WBGT.

Zelus WBGT saves time, and a lot of it

You will no longer have to wait 15 minutes for your device to equilibrate. There is no need for calibration. There is no running back inside for batteries.

It does the paperwork for you

You save the data with a push of a button. Then, when the data is needed you choose which WBGT measurements you want and the app completes the form of your choice and emails you the PDF.

The app alerts you if the temperature gets too hot during practice

Set up a countdown timer on the app and it will check the WBGT every 15 minutes. If the WBGT goes over your set threshold you will get an alert. You can even have the app save the data for you for later use.

Facts & Questions Facts & Questions

The app takes hyperlocal (less than 2.5km resolution) weather data that includes air temperature, relative humidity, solar irradiance, angle of the sun, cloud cover, wind speed, atmospheric pressure, and dew point then uses this data in complex mathematical algorithms that have been developed by the NOAA/NWS and Ph.D.s in meteorology.

Yes. Contrary to popular belief the playing surface does not change the WBGT to any appreciable degree. Grundstein A, Cooper E. Comparison of WBGTs over Different Surfaces within an Athletic Complex. Medicina (Kaunas). 2020 Jun 25;56(6):313. doi: 10.3390/medicina56060313. PMID: 32630486; PMCID: PMC7353887. Cheuvront SN, Caruso EM, Heavens KR, Karis AJ, Santee WR, Troyanos C, D'Hemecourt P. Effect of WBGT Index Measurement Location on Heat Stress Category Classification. Med Sci Sports Exerc. 2015 Sep;47(9):1958-64. doi: 10.1249/MSS.0000000000000624. PMID: 25628176.

Data is sourced from the world's most advanced weather datasets including: weather station data, NASA MODIS Satellite data, precipitation radar, weather models, multi-sensor satellite based precipitation (NASA GPM/TRMM), the MERRA2 and ERA5 re-analyses, the GLDAS re-analysis (Agro API)

Yes. In a data set of over 20,000 unique readings from May to November, WBGT calculated from weather parameters were routinely within 1 degree Celsius of WBGT using a gold standard WBGT device. https://econet.climate.ncsu.edu/wp-content/uploads/2021/05/WBGT.pdf

Yes! Please email us at info@zelusports.com and we will provide you with group pricing.

No. Our software is unique and patent pending. You can only get these services through our app.

Many more questions are answered in our knowledge base at help.zelusports.com. Or you can email us at info@zelusports.com.