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.

Features

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

Included Items

Indoor Air Quality Meter
Batteries
Hard Carrying Case

Specifications

Temperature
Measuring Ranges	14 to 140°F (-10 to 60°C)
Accuracy	±0.9°F (±0.6°C)
Resolution	0.1°F/°C
Humidity
Measuring Range	0 to 99.9% RH
Accuracy	±3% (10 to 90% RH) ±5% (<10% & >90% RH)
Resolution	0.1% RH
CO₂ (Carbon Dioxide)
Measuring Range	0 to 5,000 ppm
Accuracy	< 999 ppm: ±40 ppm >1,000 ppm: ±5% Rdg
Resolution	1 ppm
General Specifications
Response Time	1 sec
Display	Triple LCD display
Backlit Display	Yes
Dew Point / Wet Bulb Calculation	Yes
Data Hold	Yes
Min, Max and Avg Functions	Yes
CO₂ Short Term Exposure Limit (STEL)	Yes (15 mins)
CO₂ Time Weighted Average (TWA)	Yes (8 hours)
Alarm	Yes (audible)
Auto Shut-off	Yes (after 20 mins/off)
Low Battery Indicator	Yes
Power Supply	4 AA Batteries
Battery Life	Approx. 24 hours (continuous use)
Product Certifications	CE
Operating Temperature	14 to 122°F (-10 to 50°C)
Storage Temperature	14 to 140°F (-10 to 60°C)
Operating Humidity Range	10 to 85%
Dimensions	7.9 x 2.7 x 2.3" (200 x 70 x 57 mm)
Weight	6.7 oz (190g)

Applications

Environmental Monitoring in:

Schools
Office buildings
Greenhouses
Factories
Hotels
Hospitals
Areas where high levels of carbon dioxide are generated

Documents

R9900 Data Sheet

R9900 Manual

Indoor Air Quality Meters