CO2 Detector Air Quality Monitor Indoor,5-in-1 Formaldehyde/CO2/TVOC/Temperature (°F/°C)/Humidity Monitor,Portable Carbon Dioxide Detector for Home,Office,Classroom & Indoor Safety Monitoring (Milky)
$23.99
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Product description
Package Dimensions : 5.24 x 3.7 x 1.73 inches; 5.61 ounces
Item model number : A
Batteries : 1 Lithium Ion batteries required. (included)
Date First Available : September 22, 2025
Manufacturer : REFUNDONE
ASIN : B0FRZZGL99
Best Sellers Rank: #29,731 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #67 in Indoor Air Quality Meters
Customer Reviews: 4.3 4.3 out of 5 stars 54 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
5-in-1 Real-Time Air Quality Detection – Monitors CO2, Formaldehyde (HCHO), TVOC, Temperature (°F/°C), and Humidity in one compact device. Instantly assess indoor air safety for your home, office, nursery, or classroom to help protect your family from harmful pollutants.
High-Precision VOC Sensor Technology – Built with an advanced VOC sensor for accurate measurement of CO2, TVOC, and formaldehyde levels. Offers ±1% accuracy, surpassing basic detectors for more trustworthy indoor air monitoring.
2.8″ Color Display & Automatic Calibration – Features a clear HD LED color screen with color-coded alerts (Green/Yellow/Orange/Red) for easy air quality assessment. The device automatically calibrates after a 120-second warm-up for consistent and reliable readings.
4-Level Air Quality Alerts with Mute Option – Provides audible beeps when CO2, HCHO, or VOC readings exceed healthy limits. A quick press of the power button mutes alarms for sleep, meetings, or quiet environments, ensuring safety without interruption.
Lightweight, Rechargeable & Portable – Equipped with a 1200mAh battery and USB-C fast charging, supports over 24 hours of continuous use. Perfect for testing air in travel accommodations, newly furnished rooms, kitchens, bathrooms, and basements.
8 reviews for CO2 Detector Air Quality Monitor Indoor,5-in-1 Formaldehyde/CO2/TVOC/Temperature (°F/°C)/Humidity Monitor,Portable Carbon Dioxide Detector for Home,Office,Classroom & Indoor Safety Monitoring (Milky)
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$23.99
Amanda M Kidd –
Outstanding!!!!
This 5-in-1 CO₂ detector exceeded my expectations. The readings for CO₂, temperature, humidity, PM2.5, and VOCs update quickly and stay stable, giving me a clear real-time picture of my indoor air quality. The display is bright and easy to read, and the interface is straightforward—even for someone using it straight out of the box.I appreciate how sensitive and accurate the sensors are; it’s reassuring to know exactly what’s going on with my air at a glance. The compact design makes it easy to move from room to room, and the battery life has been excellent.If you want a reliable, multi-function monitor to keep your home or workspace safer and healthier, this one is absolutely worth it.
Chelsea –
Happy With The Quality
I’m really happy with this air quality monitor! It’s easy to use, compact, and gives quick, accurate readings for CO2, humidity, and temperature. The screen is clear and the rechargeable battery lasts a long time. Definitely worth it for keeping track of indoor air quality.
Rubi Concep. –
Breath Quality
I love it because it monitors temperature and CO2 levels and has color coded air quality indicators. Its display is very clear, and I like how practical and accurate it is.Its compact and rechargeable design allows for 24 hours of continuous use. Portable, it’s a good option for traveling.We used in our hotel room !
Zulianette Cruz –
Very good product !!
This detector has been very useful in our home, if i want to make sure the air is safe. It gives clear readings of CO2 and also tracks humidity and temperature. The color screen it’s easy to see at a glance if the air quality is good or if we need to open a window. The alerts can be muted when we need quiet, which is thoughtful. It feels accurate and reliable, and the rechargeable battery lasts well. A very good product
DK –
Just climbs to the top and red alerts
It’s pretty inaccurate. I calibrated both inside and outside on separate occasions and moved it from one room to another where the meter just kept climbing to a red alert. However, it was fine in the room when I initially measured it, only when I moved it from one room to another did it start going nuts and kept climbing without stopping.
abigail m –
Great air quality monitor
Really happy with this air quality monitor! It’s small, easy to set up, and gives clear CO₂ readings that seem very accurate. I like that it helps me keep an eye on the air quality and Temperature and gives me peace of mind. Great value for the price. I definitely recommend!
David –
Co2 reader review
The product look great and seem to work good but it doesn’t last long. It was fully charge and when I went to sleep and than woke up it died already. It doesn’t even last 12hr or so. It say 24hr at least. Pretty disappointing. Also when I try to charge and use at the same time to avoid it dying. It goes haywire and all the number goes up and beep. So you can t even plug it in and use it at the same time. So disappointing
Gio Savage –
reliable co2 detector with useful extra features
This detector has been very useful in our home, especially since we have a baby and want to make sure the air is safe. It gives clear readings of CO2 and also tracks humidity and temperature, which helps us keep the nursery comfortable. I like the color screen because it’s easy to see at a glance if the air quality is good or if we need to open a window. The alerts can be muted when we need quiet, which is thoughtful. It feels accurate and reliable, and the rechargeable battery lasts well. A very good purchase that gives peace of mind.