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5-in-1 CO2 Carbon Dioxide Detector, Dienmern Portable Air Quality Monitor Indoor, 1600mAh Powerful Battery CO2 Monitor for CO2/Temp/Humidity, LED Display CO2 Detector for Travel/Office/Home/Grow Tents
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The lowest-priced monitor listed, it reads CO2 from 400 to 5000 ppm with ±50 ppm accuracy, updating every second, plus AQI, temperature and humidity on an LED screen. A 1600 mAh battery runs up to 72 hours and charges by USB. Its range and accuracy are similar to many costlier units, suiting budget buyers who want a simple portable readout.
- Price
- $23.99
- Brand
- Dienmern
Prices from Amazon as of . Product prices and availability are accurate as of the date and time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of the product. As an Amazon Associate I earn from qualifying purchases.
How it compares
Compared with the other carbon dioxide detectors on this site that list each value:
- Sampling interval is lower than 71% of 7 others: 1 s
Specifications
These details are subject to change and may not be current. Please check Amazon or manufacturer web site to confirm before purchase.
Detection capabilities
- Gases detected
- CO2
- Max. CO2 detection
- 5,000 ppm
- Min. CO2 detection
- 400 ppm
- Accuracy
- ±50 ppm
- Sampling interval
- 1 s
- Temperature & humidity readout
- Yes
Charging
- Battery runtime
- 72 hours
- Battery capacity
- 1,600 mAh
Features
Details from the Dienmern Amazon listing:
- 【CO2 monitor】 This CO2 monitor keeps track of CO2, AQI, temperature, and humidity in real time. It’s made to give you clear, easy-to-read info at a glance, so you can stay on top of your indoor air quality and keep your space healthier and more comfortable.
- 【Swiss-Made High-Precision CO2 Sensor】 Built with a Swiss-made CO2 Sensor, this air quality tester gives you highly accurate CO2 readings every second. With a wide detection range of 400–5000 ppm and accuracy of ±50 ppm, it keeps you informed of changes in your air. Plus, the added temperature and humidity sensors provide complete indoor monitoring for a healthier environment.
- 【Smart Visual Display】 This indoor air quality monitor comes with a bright LED screen that shows CO2, AQI, temperature, and humidity in real time. The clear visuals and high contrast make it easy to read at a glance, anytime—day or night—so you always know what the air around you is like.
- 【Built-in 1600mAh Battery】 With a built-in 1600mAh lithium battery, this air quality monitor can run for up to 72 hours on a single charge. It supports USB charging and is lightweight enough to carry around, while also perfect for keeping in one spot at home or the office.
- 【Necessity of Air Quality Monitoring】Low levels of carbon dioxide detector are generally harmless, but when the concentration exceeds a certain limit, it can affect breathing in humans and other living organisms. In severe cases, it can even become life-threatening. Therefore, monitoring CO2 levels in the air is essential for maintaining a healthy environment.
- 【Note】Dear customer, just a heads-up: CO2 meters can have a little variation of around ±50 ppm. That’s simply because each CO2 meter uses a different sensor, so the readings might not be exactly the same. Thanks for your patience and understanding.
Similar products from other brands
Chosen for their similar specifications and price.
 This product5-in-1 CO2 Carbon Dioxide Detector, Dienmern Portable Air Quality Monitor Indoor, 1600mAh Powerful Battery CO2 Monitor for CO2/Temp/Humidity, LED Display CO2 Detector for Travel/Office/Home/Grow Tents |
 INKBIRDPLUS PTH-10C |
 ATuMan CF1 |
 Temtop C1+ |
|
|---|---|---|---|---|
| Price | $23.99 | $42.99 | $59.99 | $42.99 |
| Model | – | PTH-10C | CF1 | C1+ |
| Gases detected | CO2 | CO2 | CO2 | CO2 |
| Max. CO2 detection (ppm) | 5,000 | 5,000 | 5,000 | 5,000 |
| Min. CO2 detection (ppm) | 400 | 400 | 400 | 400 |
| Accuracy | ±50 ppm | ±(50ppm + 5%) | – | ±(40ppm +5%) (400-2500ppm) |
| Resolution (ppm) | – | – | – | 1 |
| Sampling interval (s) | 1 | – | – | – |
| Temperature & humidity readout | Yes | – | Yes | Yes |
| Sensor type | – | NDIR | NDIR | – |
| Calibration method | – | Automatic calibration (can be turned off); manual calibration (200-second countdown in fresh air) | – | Manual fresh-air calibration (about 400 ppm, 200-second countdown) |
| Data logging | – | – | – | Yes |
| High alarm level (ppm) | – | 1,500 | – | – |
| Adjustable alarm levels | – | Yes | – | – |
| Alarm types | – | Sound, color indicator lights | – | Buzzer (optional) and color-coded CO2 indicator |
| Weight (lbs) | – | 0.31 | 0.46 | 0.24 |
| Weight (kg) | – | 0.14 | 0.21 | 0.11 |
| Length (in.) | – | 2.99 | 1.20 | 3.50 |
| Length (mm) | – | 76 | 30 | 89 |
| Width (in.) | – | 2.76 | 3.50 | 2.70 |
| Width (mm) | – | 70 | 89 | 69 |
| Depth/Height (in.) | – | 1.18 | 3.50 | 0.70 |
| Depth/Height (mm) | – | 30 | 89 | 18 |
| Display type | – | Full-color LCD | 3.0-inch LED display | 3.3-inch segment-code LCD |
| DC input voltage | – | 5V-24V | – | 5V |
| Charging port | – | USB-C | USB-C | – |
| Battery runtime (hours) | 72 | 72 | – | – |
| Battery capacity (mAh) | 1,600 | 1,000 | 2,200 | 800 |
| Battery chemistry | – | Lithium-ion polymer | – | Lithium |
| Operating temp min (℉) | – | – | – | 14 |
| Operating temp max (℉) | – | – | – | 140 |
| Operating temp min (℃) | – | – | – | -10 |
| Operating temp max (℃) | – | – | – | 60 |
| Warranty | – | 1 Year | – | 1 Year |
Specifications last updated Oct 20, 2026.