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Your cart is empty.Valser
July 29, 2025
Works great, long-lasting battery!
aw
July 24, 2025
only complaint is that it does not do very well automatically detecting and reporting changes in CO2 levels in a room. I find i have to do that manually by turning the unit off and then restarting it in order to get a new co2 reading for my indoor location. A bit annoying.
Uncle Chunx
July 23, 2025
Incredible battery life. CO2 matches the Aranets within ten to 25ppm. Received a 10% off coupon from Amazon, so it's almost 1/4th the original price of Aranet4. Even now it's almost 1/3 the price. Get this portable unit and add a layer of protection when you go out or are in crowds. The only drawback for me is no protective case as of yet. I've already ordered a second one with the same deal and giving it as a present. Would highly recommend.
JM
July 7, 2025
Unit doesn’t connect to the internet or my phone. I can change the settings in my app such as temperature on the phone, but does not update to the unit setting change because of the connectivity issue. I failed to return in the available return window.
Hasax
June 19, 2025
In order to change any setting like switching from Celsius to Fahrenheit you must create an account to use the app and this is not listed in the devise description anywhere that I noticed. I assumed I could grab the app on an old device that is turned of all the time other than for stuff like this and not connected to the internet but nope. Had I known this I would have got the basic $35 one from another company that uses the same co2 sensor. It would be nice if it had a simple BT app to change C to F and set alarm to got off it hits a certain co2 ppm but nope you have to create an account and give the them your email or phones number. And yes just like the account requirement it doesn't mention this thing has BT.Now I must debate if I want to create a throw away email account so I can set an alarm on this thing, find an old copy Qingping+ before accounts were required that works with the device or just send it back and get the basic one that costs half the price of this one.Update 1Not sure what happened to update 1 so a quick recap of that is I installed apps on an android 7 device but kept getting Network Error when I tried to create an account. Internet worked I used it to download the apk's from Qingping website.Update 2Installed it on an android 9 device and was able to create and account. Apparently you don't need one for the Qingping+ app since it has a Skip option at login but this CO2 monitor wasn't a device it listed. Loaded the IOT app and and it would not connect to BT. Yes it had permission and yes the BT logo was flashing on the device wile the app scanned for it. I even tried connection outside of the app and the device was seen. When I tried to pair it did something but didn't show as paired in android, oddly the BT logo and device stayed solid after the attempt. I tried app again with logo solid on device but it would just scan a wile the show error 4004 and ask to try again. At this point I think I'm sending it back, no point if I cant change any settings and the thing seems to pause monitoring after a minutes no clue when it decides to update co2 levels again so I have to hit the button.
Jiansong Huang
June 13, 2025
I used to close the window all the time (pollen and AC), sometimes I felt uncomfortable breathing in the night. After purchasing this I saw my room CO2 density went up to 2300 easily, quite explained why hard to breathe. I am not sure how accurate it is, but for a home non professional use it worth its value!
Customer
May 26, 2025
The product and app are very well designed. I rarely write reviews, but the product only has 4/5 stars at this time which is too low. Manual calibration, data logging, and battery life are all huge selling points.
Thomas
March 19, 2025
I recently read a study of CO2 levels of single-occupant dorm rooms in Denmark, and I was surprised to read that CO2 levels with windows closed often exceeded 2000 ppm, which is well above recommended levels. The study also showed that when students slept in rooms with those high CO2 levels, their performance the next day was lower than that of students sleeping in rooms with lower CO2 levels (because of open windows or ventilation fans).I had never really thought about CO2 levels in my environment, but I ordered this to measure CO2 levels in rooms I work and sleep in. The insulation is good, but even with a ventilation system, I discovered that CO2 levels in my office often exceed 600 ppm when the door is closed, and once even got up to 1000.This CO2 monitor is a useful tool for keeping track of CO2 levels, and ensuring that they don’t get too high, especially when things are closed up, e.g., because of cold or heat. The temperature and humidity readings are useful too, and are consistent with measurements from other devices, but the CO2 reading is the main feature of this device.One irritation with this device is that accessing it remotely requires registering an e-mail address with the Chinese manufacturer. I tried registering with a non-primary e-mail address, but never received a confirmation code, so couldn’t test the app. For that reason, I took off one star.Overall, this is a handy device to have, especially when working in an office for long periods, or sleeping, and I can recommend it.
Ahmet Cahit
January 23, 2025
çok güzel bir ürün
Aleks R.
January 12, 2025
El producto estaba bloqueado para otro cliente. Tuve que devolverlo. Todavía no he recibido el reembolso de Amazon.
Mike
January 10, 2025
Der Sensor zeigt den CO₂-Gehalt, die Luftfeuchtigkeit und die Temperatur ausreichend genau an, benötigt jedoch eine Stromversorgung über eine Steckdose, da die CO₂-Messung einen erheblichen Stromverbrauch hat, was den Betrieb mit Batterien erschwert. Ein eingebauter Akku sorgt dafür, dass die Werte beim Wechsel zwischen Steckdosen nicht verloren gehen. Darüber hinaus trägt vermutlich auch der Versuch, sich mit WLAN zu verbinden, zum Stromverbrauch bei. Bisher bin ich mit der Anzeigefunktion zufrieden, daher habe ich ihn noch nicht per QR-Code registriert. Vielleicht werde ich das in Zukunft nachholen, um die Graphen von Temperatur, Feuchtigkeit und CO₂ einsehen zu können. Aktuell nutze ich ihn vor allem, um mich ans Lüften des Zimmers zu erinnern. Um genaue Werte zu gewährleisten, kalibriere ich ihn beim Lüften, indem ich ihn auf das Fensterbrett stelle, bis er 400 ppm CO₂ anzeigt – solche Sensoren müssen, wie ich gehört habe, gelegentlich kalibriert werden.
蜜柑星人
November 28, 2024
暖房を入れて1時間もしないうちに濃度が9000近くに達します。流石にこの濃度では生きていられないのでは・・・?暖房21度設定なのに27度というのもよくわからないです。
Si Informatica di Ventura Ottorino
November 3, 2024
Configurazione semplice. Scarno il sw ma fa il suo dovere.
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