Heat Stress: What is Wet Bulb Globe Temperature?

There are many ways to measure the weather around us. When it comes to measuring heat stress, wet bulb globe temperature (WBGT) takes temperature, humidity, wind speed, sun angle, and cloud cover into account. WBGT differs from heat index. Heat index considers temperature and humidity and it’s calculated for shady areas. Why Use Wet Bulb Globe Temperature? Organizations such as the military and OSHA use WBGT to help manage workload in direct sunlight. This is also an important measurement for those who are doing exercise in hot conditions. When using WBGT, it can be used as a guideline for safety...

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Viewing PIG/FDFM on your 5500 & 5400 Fire Meters

When viewing your Kestrel 5400FW or 5500FW, you will see one screen called Probability of Ignition (PIG) and directly under (on the same screen) the Fine Dead Fuel Moisture (FDFM) reading. Please see the image below. Wondering what you'll see when viewing the device on the Kestrel LiNK app? Here are a few sample images below.

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Compass Error in Kestrel 4500 and 4600 Units

We've been receiving reports that the Kestrel 4500 and 4600 models are having an issue recording compass direction when the unit powers off. The issue started with firmware version 4.83 and has appeared in several updates since. We have resolved this issue with firmware version 4.89. If you have a Kestrel meter with firmware version 4.76 or higher and would like to upgrade your firmware to the latest version, please contact techsupport@nkhome.com to discuss your options. Please note: Kestrel meters with firmware lower than 4.76 cannot be upgraded further due to their internal board, but should not be experiencing the...

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Heat Wave Affecting HIgh School Sports

“The Burlington Free Press just posted a good article addressing heat stress and high school  sports.  With the recent heat wave, schools need to carefully monitor their student athletes.  Read the full article here

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