This IAQ (indoor air quality) meter simultaneously monitors carbon
dioxide, relative humidity, and temperature. The R9900 is capable of
automatically calculating wet bulb and dew point temperatures as well as
statistical TWA and STEL averages.
This product includes a Traceable Certificate with full Data and Uncertainties.
- Triple LCD display simultaneously monitors carbon dioxide (CO2), relative humidity and temperature
- Automatically calculates dew point and wet bulb
- Calculates statistical weighted averages of TWA (8 hour time weighted average) and STEL (15 minute short term exposure limit)
- User adjustable audible alarm
- Data hold, Max/Min and average functions
- Low battery indicator and auto shut off