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Extech Digital Thermometer

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Built-in multi-parameter sensor measures heat index, wet bulb globe temperature (WGBT), humidity, ambient temperature, temperature, dew point, and wet bulb
User programmable heat index/WBGT alarm
Minimum/maximum/average meter functions

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Extech’s pocket-sized heat index psychrometer pen easily monitors heat index during hot humid days to prevent heat stroke during outdoor activities, sporting events or, indoor workplace. Its pen-sized design makes it convenient to fit into your pocket and carry it wherever you go.

Built-in multi-parameter sensor measures heat index, wet bulb globe temperature (WGBT), humidity, ambient temperature, temperature, dew point, and wet bulb
User programmable heat index/WBGT alarm
Minimum/maximum/average meter functions
Data hold and auto power off with disable
Complete with CR2032 battery