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Steve
Reviewed in the United States on March 6, 2025
This 3-in-1 carbon monoxide (CO) detector from Aliestfdno is a highly versatile sensor. In addition to monitoring CO levels, it also measures temperature and humidity. I have several thermo-hygrometers in my home, but none that include a CO sensor. The temperature and humidity readings from this device align well with my other units. My main concern was detecting CO. Upon activation, the ppm readings drop to zero, which may give a false sense of functionality. I plan to test the device further by placing it near my car's exhaust pipe and next to my smoker to see if I can get any readings.This detector also boasts impressive battery life, partially due to its backlight feature, which turns off automatically. A short press of the button reactivates the backlight, and a longer press turns the unit off. Overall, this device should be a good addition to any home.
Allison G.
Reviewed in the United States on March 31, 2025
Finally got around to testing this. Blew smoke onto the back and it registered almost immediately. It's not too heavy, small enough, fits in a palm. What is really good is the display is bright and readable even in the sunlight. It shows the ppm in big numbers, then below it shows the humidity and temperature, and the battery level. A button to change from F to C. There is a buzzer/alarm, but it doesn't say what it is set at. I guess at whatever level CO is dangerous. This one is going with the camping gear, to use when we have the propane firepit under a canopy, so we know we aren't letting enough fresh air circulate! I don't know how accurate it is, don't know how to test that. Actually tested with smoke side by side with another meter, they measured within 1 or 2 numbers from each other. Don't know if the other one is correct either. Just going to trust they can measure when there is a dangerous level.
Keke Shaé
Reviewed in the United States on March 27, 2025
I've been looking for a way to detect carbon monoxide (CO) levels for quite some time, so I'm glad I found this product. I love that the screen displays CO levels, humidity, and temperature. I haven't experienced any issues with the batteries. It's very easy to use, and its portability is a great advantage.
Antonio Cruz Jr
Reviewed in the United States on March 11, 2025
Compact size for traveling
Pooja Amin
Reviewed in the United States on February 22, 2025
This 3-in-1 CO detector is pretty neat. It's small and portable, which is exactly what I was looking for. It shows CO levels, temperature, and humidity with the color-coded alerts which make it super easy to read at a glance.The battery life seems decent so far. They claim 480 hours, which I haven't fully tested, but it's definitely lasted through several days of use without needing a charge. I've used it in my house and also took it camping. Gives me some peace of mind, especially when I'm in my RV. If you're looking for a portable air quality monitor, this one is good!
Marsupialite
Reviewed in the United States on February 19, 2025
What a lovely idea. I like the unique features of Airbnbs, but one thing I worry about is CO detectors either not being installed properly or at all. You never know with a home property, so I carry my own just in case. This is perfect for a passive detector that is easy to carry. I love that it has a screen that shows the levels of CO, humidity, temperature and battery all at the same time. That makes it so easy to check. The screen never turns off but it isn't bright so that it would be disruptive to sleep, and after several days of use I can confirm that the battery is still completely full. It's a bit more than I would usually pay for something like this, but I would get another one now that I have seen how well it works! If I get 5 years of use out of it, that's only $7 a year to keep us safe as we travel, which seems like a great deal to me.
MM
Reviewed in the United States on January 26, 2025
This CO detector is pocketable (see photo) and comes with a cutely tied lanyard/carabiner. It also comes with a 1 meter USB A-to-C power-only cable for charging. It’s magnetic on the back so you can stick it to things. It correctly told me when there was no carbon monoxide present. and when I generated some carbon monoxide (by starving a candle) it detected that too. You can adjust the alarm threshold.
User
Reviewed in the United States on April 7, 2025
Great safety gadget
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