While this product may be accurate - I have no way to verify that - the main problem I have with it is its battery life.It ran quite well the first 3 or 4 months after I received it. Then the battery started draining very quickly. There were times when it seemed to run down within an hour or two. Since I don't move it around, I just started plugging it in and using it in-place. Well, one morning the power had been off, and there was no display at all. I plugged it in, and the screen showed "Recharging." The next morning, 24 hours later, the same message was still in place.I unplugged it, and now it won't recharge at all. However, I can hear the slight sound of the circulation fan running. For that reason, this could be a display problem and not a battery problem.But the slow to non-existent recharge indicates a faulty battery.Other than this BIG negative, the screen is easy to read, it's quiet when it's circulating air, and it's small enough to put almost anywhere.

Ich habe das CHNADKS 9-in-1 Luftqualität Messgerät kostenlos zum Testen erhalten.Das Gerät wurde schnell geliefert und war in einer hochwertigen Verkaufschachtel sicher verpackt. Die Anleitung ist leider nur in Englisch. Ein USB-C-Ladekabel wurde mitgeliefert.Das Kunststoffgehäuse ist sehr sauber verarbeitet und macht einen stabilen Eindruck.Das e-Ink-Display ist sehr gut ablesbar, muss aber dafür ausreichend beleuchtet sein.Das Gerät hat einen eingebauten Lüfter der die Umgebungsluft zur Analyse ansaugt. Dieser Lüfter ist kaum hörbar. Das Gerät reagiert sehr schnell auf Änderung der Luftqualität (kurzes Anhauchen genügt). Die Einstellung erfolgt über zwei Tasten an der Oberseite des Geräts und ist nach kurzem Ausprobieren und Anleitungsstudium problemlos möglich.Es ist ein 2000 mAh Akku eingebaut, der über USB-C geladen werden kann (Ladegerät nicht enthalten). Im ECO-Modus analysiert das Gerät die Luft alle 30 Minuten und hat eine Akkulaufzeit von bis zu 30 Tagen. IM RT-Modus hält der Akku 18–24 Stunden.Es werden folgende Daten erhoben:Formaldehyd (HCHO)Kohlendioxid (CO2)PM2,5-FeinstaubPM10-FeinstaubLuftqualitätGesamtmenge flüchtiger organischer Verbindungen (TVOC)Temperatur und Luftfeuchtigkeit.Die Genauigkeit der Daten kann ich leider nicht prüfen.Hochwertig wirkendes Messgerät zur Überwachung der Luftqualität. 5 Sterne.

Minus: Drei gleiche Geräte und ein uraltes Gerät parallel am gleichen Ort betrieben und trotz 4Tage Calibrierung ziemlich voneinander abweichende Messergebnisse. Wem darf man nun glauben?AQ wird ziemlich unglaubwürdig hoch angezeigt. Sinkt nach Raumlüftung ziemlich spontan.Einstellung über die Tasten sehr mühsam. Keine Kontrolle ob Calibriering vollständig durchgeführt ist, sollte vom Hersteller vor-calibriert werden.Plus: Die Batteriedauer ist länger als 3 Wochen, Aufladung mit USB-C, damit unabhängig von Steckdose. Beim Altgerät zum Vergleich 10 Std, Aufladung mit USB-mikro.

Das Gerät ist billig, handlich und einfach zu bedienen.Die Messungen habe ich mit Hilfe teurerer Geräte überprüft. Das CHNADKS 9-in-1 überzeugt mich bei der Messung von CO2 und Feinstaub. Es enttäuscht bei den Messungen von TVOC und relativer Luftfeuchtigkeit. Dort weichen die Angaben des CHNADKS 9-in-1 sehr stark von den tatsächlichen Werten ab. Das Gerät ist für mich so gut wie wertlos ist. Ich habe es retourniert.

Does not keep time or date- battery shows fully depleted after less than 24hrs in normal mode- economy, lasted longer, but does not seem to be enough juice to have everything synchronized properly.For the 90.-€ price, I would have expected much more

I started worrying about air quality during the COVID-19 pandemic. The importance of airing the room I was occupying became important for me and my family. I was mostly interested in CO2 and small particles in the air as my better half is asthmatic.After a long research of the options (the pandemic was over 2 years ago), we zeroed in on this product. There were no guarantees it was going to work, but we are really happy as it seems to be reacting even to small changes in our environment. For example, the CO2 goes quickly down when we open the balcony door to our bedroom. Similarly, if in a small room all doors and windows are closed, soon the CO2 creeps up.The product has a continuous reading mode, which gives you real-time measurements, but drains the battery, thus can last only a day without charging. However, that is enough as I took it on one of my business trips and boy was I surprised by the amount of CO2 on board of an airplane.All in all, very satisfied with this purchase.I just realised the photo shows TVOC at 0.000. This is the first time I have seen this. Will report back if it goes back to some normal reading.

Not eve close to accurate. Display quit after 2 days. Sent back

Die Lieferung erschien so pünktlich und schnell wie angekündigt. Die Suche nach einer Bedienungsanleitung war zu nächst schwierig. Nach ein paar Tagen später fand ich diese dann doch noch im Internet und zwar auf deutsch.Der Kauf hat sich voll gelohnt.

I love this air quality monitor. It's got very clear screen which shows you order the things that you mostly interested in, but for me it's always the CO2 that drives everything. Too much CO2 in a room can make you feel really drowsy, so it's important to keep the figure low. This helps guide that. It's also got other metrics such as temperature, humidity levels which is useful to see, however not something that I've used much. The AQ number fits what my other devices say which is good.Cant really go wrong with this product at this price

Das Gerät misst und stellt die gemessenen Werte gut nachvollziehbar dar. Der Batterieverbrauch ist höher als wertet - aufladbare Batterien machen hier sicherlich Sinn.Die beiliegende Anleitung ist nur in Englisch vorhanden und auch mit sehr guten Sprachkenntnissen als spärlich zu bezeichnen. Das Einstellen - egal ob Uhrzeit oder Maßeinheiten - ist mit nur zwei Tasten und teilweise 8 Sekunden langem Drücken einzelner Tasten eine Qual. Und die Kalibrierung des Mess-Sensoren entzieht sich meinem Verständnis. Und ich komm aus einem IT-Umfeld.Bei einem Preis von aktuell rund 90€ ist das für mich nicht nachvollziehbar. Das ist ein Vollpreisprodukt, dass in keiner Weise für den deutschen Markt adaptiert wurde.

I'm not sure how accurate this air quality monitor is. In a room that I suspect harmful substances were smoked in by previous occupants, the monitor indicates that the air quality is excellent; and in another room in which I thought everything was fine the monitor indicated that the air quality is good.

Die Medien konnten nicht geladen werden.

After doing extensive research on consumer grade air quality monitors, I was skeptical that I'd find a quality device at a fair price. However, this AQ-60 is by far the best portable air quality monitor I've seen from anyone. It's well thought out, accurate, fast responding, reliable, right-sized and backed by a seller that quickly answered all of my questions in great detail.Bottom line: Get this. You won't be disappointed.Below are my pros and cons as well as hands-on experience in using it.PROS1. Many Pollutant Sensors and 10 readings instantly visible on one screen: Air Quality, HCHO (Formaldehyde), CO2, TVOC, PM2.5, PM10, Temperature, Humidity, Date, Time.2. Accurate, fast readings, reliable3. Rechargable. Long lasting 30-day battery (in eco mode). Optionally, use USB-C to stay plugged in.3. Portability. Take it to any room, the office, a friend or family's home4. Customize screen. Show any sensor reading at top (above all other readings) by left button clicks.5. Handle. Securely carry or hang device.CONS & MITIGATIONS1. On screen setup could be more clearMitigation: It's a one-time learning curve. Just play with it to get used to it.2. No pollution trackingMitigation: This device is best used for real-time readouts3. No alarmMitigation: A quick glance shows air quality and all other sensor readings instantlyENHANCEMENTS I'D LIKE1. Backlight button to see in the low light2. Threshold alarm on AQ and/or sensor(s)MY HANDS-ON EXPERIENCEI was glad to learn that my home is better ventilated than I thought. I expected that garages and bathrooms would have worse air quality than living rooms and bedrooms. However, I was shocked to see that it's completely true about eating green/yellow bananas compared to yellow/brown ones.=> See my related pics and below descriptions.PIC (POLLUTANTS CHART):Color coded chart based on user manual and seller responses to my questions.PIC (LIVING ROOM):EXCELLENT... Windows open, fan on, lots of living room ventilation.PIC (BATHROOM):GOOD... Slightly elevated HCHO formaldehyde levels in a minimally used bathroom.PIC (GARAGE):POLLUTION... All pollutants somewhat elevated after turning on a sedan for only 30 seconds in a closed two car garage.PIC YELLOW/BROWN SPOTS BANANA):EXTREMELY DANGEROUS... AQ (air quality) is on last row, 95/100. HCHOs (formaldehyde levels) are 2.377 and off the chart being greater than 0.35. TVOCs (total volatile organic compounds) are way too high at 4.729.POLLUTANTS & IMPACTS TO OUR HEALTHAQ (Air Quality): A scale used to measure air quality based on the levels of various air pollutants, including PM2.5 and PM10. AQ ranges from 0 (excellent) to 100 (extremely dangerous).TVOC (Total Volatile Organic Compounds): A group of hundreds of gases and vapors that can cause eye, nose, and throat irritation, headaches, dizziness and nausea. TVOC sources include paints, cleaning products, furniture and cigarette smoke. In high concentrations, they can also cause respiratory problems and cancer.CO2 (Carbon Dioxide): A colorless, odorless gas that can cause headaches, fatigue and difficulty concentrating. Increased CO2 levels can indicate poorly ventilated areas. CO2 sources include fuel-burning appliances (gas stoves, furnaces, fireplaces), combustable appliances (grills, generators, welding equipment), decomposing organic matter (food scraps, yard waste, compost), plants, pets and humans. When the source is human, high levels of CO2 add risk for the transmission of respiratory and air-bourne disease (COVID-19, respiratory syncytial virus, measles, influenza, tuberculosis, pneumococcal pneumonia, Legionnaires' disease).HCHO (Formaldehyde): A colorless, pungent-smelling gas that can cause eye, nose, and throat irritation, headaches and nausea. HCHO are found in a variety of products, including building materials, furniture and household cleaners. In high concentrations, it can also cause cancer.PM2.5 (Fine Particulate Matter): A type of small particle air pollution (2.5 micrometers or less) that can be inhaled deep into the lungs, causing health problems, respiratory infections, heart disease and cancer. Sources include wildfires, fossil fuels (cars, trucks, buses, power plants, industrial boilers), construction dust emissions (construction sites, demolition sites, roads) and agriculture dust emissions (agricultural fields, manure, crop burning residue). PM2.5 can be transported long distances by wind, so it is important to consider both local and regional sources when assessing air quality.PM10 (Coarse Particulate Matter): A type of coarse particle air pollution (10 micrometers or less) that can be inhaled into the lungs, but it is less likely to reach the deep lung tissue as with PM2.5. PM10 can health problems, including respiratory infections, heart disease, and cancer. In addition to the sources of PM2.5, natural sources include dust from deserts, pollen and sea salt. PM10 can be transported hundreds or even thousands of miles by wind.