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Description
Reed Instruments Indoor Air Quality Meter R9905This data logging Indoor Air Quality (IAQ) Meter has the ability to record samples on internal memory and keep track of registered readings with a time and date stamp. The R9905 features a Nondispersive Infrared (NDIR) CO2 sensor for stable, accurate readings and the option to track live measurements via software. Features Triple LCD display simultaneously monitors carbon dioxide (CO2), temperature and relative humidity Calculates time weighted
This data logging Indoor Air Quality (IAQ) Meter has the ability to record samples on internal memory and keep track of registered readings with a time and date stamp. The R9905 features a Nondispersive Infrared (NDIR) CO2 sensor for stable, accurate readings and the option to track live measurements via software.
Features
- Triple LCD display simultaneously monitors carbon dioxide (CO2), temperature and relative humidity
- Calculates time-weighted average (TWA) and short-term exposure limit (STEL)
- Low-drift NDIR CO2 sensor for stable and accurate readings
- Temperature and relative humidity measurements help determine thermal comfort
- Easy-to-read backlit LCD display
- User adjustable audible alarm
- Data hold, Max/Min and Average functions
- Record up to 32,000 datapoints and keep track with internal time and date stamp
- User selectable sampling rate from 1 to 60 mins
- Low battery indicator and auto shut-off
Specifications
| Temperature | |
| Measuring Range | -4 to 140°F (-20 to 60°C) |
| Accuracy | ±1.5°F (±0.8°C) |
| Resolution | 0.1°F/°C |
| Humidity | |
| Measuring Range | 0 to 100% RH |
| Accuracy | 10 to 90% RH: ±3% |
| <10% & >90% RH: ±5% | |
| Resolution | 0.1% RH |
| CO2 (Carbon Dioxide) | |
| Sensor Type | Nondispersive Infrared (NDIR) |
| Measuring Range | 0 to 30,000ppm |
| Accuracy |
0 to 5000ppm: ±(75ppm +3% rdg.) 5001 to 30,000ppm: ±(150ppm +5% rdg.) |
| Resolution | 1ppm |
| Warm-up Time | 20s |
| Sampling Rate | 2s |
| General Specifications | |
| Display | LCD |
| Backlit Display | Yes |
| Data Hold | Yes |
| Min, Max, Avg Functions | Yes |
| CO2 Short Term Exposure Limit (STEL) | Yes (15 mins) |
| CO2 Time Weighted Average (TWA) | Yes (8 hours) |
| Datalogging Capabilities | Yes |
| Real-Time Clock and Date Stamp | Yes |
| Selectable Sampling Rate | Yes (between 1s and 60m59s) |
| Internal Memory | Yes (32,000 datapoints) |
| Alarm | Yes (Low and High) |
| Auto Shut-off | Yes (adjustable) |
| Kick Stand | Yes |
| Low Battery Indicator | Yes |
| Power Supply | 9V battery |
| Battery Life | Approx. 10 hours (continuous use) |
| PC Connectivity | USB |
| Software OS Compatibility | Windows 7 / 8 / 10 |
| Product Certifications | CE |
| Operating Temperature | 32 to 122°F (0 to 50°C) |
| Storage Temperature | -4 to 140°F (-20 to 60°C) |
| Operating Humidity Range | 0 to 90% |
| Storage Humidity Range | 10 to 75% |
| Maximum Operating Altitude | 6561' (2000m) |
| Dimensions | 11.2 x 2.6 x 1.5" (284 x 65 x 39mm) |
| Weight | 10.7oz (304g) |
Included Items
- Indoor Air Quality Meter
- USB Cable
- Hard Carrying Case
- Batteries
Applications
- Environmental monitoring in buildings, schools, hospitals and factories
- Verify HVAC/R system installation and system performance
- Manufacturing processes where high CO2 concentrations must be measured, such as fire extinguishers, wine, soda and sugar industries
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
Super soft & cute
Color: Pink, Color: Pink
The color is amazing, between that & how soft it is, my brain is so happy about it lol. Matches my covers nicely (also got from amazon). The things shed very slightly, but I personally think its so worth it lol. I have a mini car vacuum & a lint roller, so its easy for me to keep it tidy anyhow. The bejeweled circle for a push to start, well I don't have that in my car. However the circle fit perfectly on my cold/hot knob lol literally the exact same diameter. Highly recommend this set, especially for this price.
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Reviewed in the United States on August 1, 2024
★★★★★ 5
Good Deal
Color: Royal blue
Wish I would’ve seen this package before buying the items individually but I still bought it because it’s a good deal. Looks great in my blue Honda CR-V. So soft!
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Reviewed in the United States on December 8, 2025
★★★★★ 5
This is my color, so pretty 😍
Color: Pink
This beautiful pink is my color on the inside ov my custom chevy silverado it's nice and soft 💓 and pretty BUT I have a sunshade for my front window and they should not fade so fast BUT, they do this is my 3 set in a years time because of the fading only It's the price you pay I guess to keep a custom truck look pretty
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Reviewed in the United States on May 27, 2025
★★★★★ 4
Pretty in pink
Color: Pink
I’d totally give 5 starts but the middle console cover was too small and the cute little rhinestone ring didn’t fit the push button bc it’s not a flat surface. Otherwise I really like the rest. It’s a very soft pink. Does shed a bit at first. My cat loves the keychain puff.
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Reviewed in the United States on July 10, 2025
★★★★★ 5
Mustttttttt Buy
Color: Pink, Color: Pink
This Was The Most Perfect Buy. SUPER SOFT. You have to buy this. I promise you WILL NOT, regret it. Everything fits perfectly. Very easy to install. Very soft. Looks like really good fur was used.
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Reviewed in the United States on March 14, 2026