Extech HT200 Heat Stress WGBT Meter.

Dual display of Carbon Dioxide (CO2) concentrations and Relative Humidity, Temperature, Dew Point, or Wet BulbMaintenance free NDIR (non-dispersive infrared) CO2 sensorAudible CO2 warning alarm when concentration level exceeds high user set point

Extech’s Heat Stress WBGT (Wet Bulb Globe Temperature) Meter accurately determines the Heat Stress level (how hot it feels outside) by factoring a combination of humidity, temperature, air movement, and direct solar radiation. These factors all affect how hot our bodies get, as well as our ability to cool down. It’s perfect for monitoring the Heat Index on hot humid days to prevent heat stroke during road or building construction, outdoor activities, sporting events, or in the workplace.

1. Up Arrow/MAX-MIN button
2. MODE/SET button
3. Power ON-OFF button
4. UNIT/DATA HOLD button
5. LCD Display
6. Temperature & Humidity sensor
7. Black Globe sensor
8. Backlight/MEM button
9. SEL/Alarm button
10. Down arrow/REC button
11. AC Adaptor power jack

Note: Battery compartment on back.