U UNNI CO2 Monitor Carbon Dioxide Detector for Home, 3 Adjustable Volume for Alerts & 3 Adjustable Backlight, Photoacoustic Sensor for Temperature Humidity & Indoor Air Quality Monitor

TOP QUALITY device for home safety. This CO2 monitor carbon dioxide detector functions accurately. It provides an easy-to-read, backlit, multi-color display that is easy to comprehend at a glance. The alert volume setting is adjustable. The device is designed to monitor indoor air quality, providing temperature and humidity readings. I especially like the CO2 reading scale that arches across the top of the screen, showing actual PPM in large, bold numbers, and historical readings. Most important is the audible alert that "sounds off" when levels reach a danger zone, indicating the need to open a few windows and vent the rooms. Without these alarms, most people would never realize the danger of inhaling the bad things this device detects. If you have growing children or are elderly, having this type of technology in your home is a way to maintain optimum air quality and health. I have thoroughly tested the product in several scenarios, including cooking, a wood-burning fireplace, and candles. During each test, I watched the levels increase, hearing the alarm turn on and off, as I made adjustments to the environment. This is my second product from this company, and I can report and review that the products work as advertised, and they stand behind them with exceptional support when/if needed. Don't hesitate to give them your business.

The Unni carbon dioxide monitor UN0601 is small and light and seems very accurate. The display is clear and easy to read and can be dimmed or turned off. It comes with a USB cord that plugs in to any charger. Batteries can be used for memory or temporary testing, but are not necessary for the unit to function. To test the accuracy, I placed it outdoors and it was reading 401 ppm, which is normal carbon dioxide level in outdoor air. Indoor it was reading 568 ppm and it was going up when there were more people in the room and with some candles lit. The level went down to 489 ppm in the same room overnight when there were no people or lit candles. The monitor also has a thermometer and humidity function. I tested it side-by-side with a UNNI thermometer and it displayed the same temperature and humidity digits as the other unit, with only a fraction difference. The temperature can be set to Fahrenheit or Celsius. The monitor has an alarm feature that can be set if the CO2 level becomes too high. I tested by blowing on it and it went up to over 1000 ppm and a window symbol was lit on the display, indicating it is time to ventilate the room. This carbon dioxide monitor appears to work great and can be used in places where people gather, such as in schools, churches or similar, but also in your home. EDIT: This is a review of Unni Air Quality Monitor UN0602. There is a USB power cable and adapter included in the box along with instructions. When you first plug it in, there is a few minutes of count down before the display starts to show any values. The calendar and clock is easy to set and there is an option for 12 hour or 24 hour format, and daylight savings time. The unit monitors CO2 in the air, expressed in parts per million (ppm). The outdoor air is typically around 400 ppm for normal clean air. CO2 values over 1000 is too high and ventilation is needed. I tested the device side by side with an older same brand CO2 monitor UN0601 and found that the values were close, but not in agreement until after one week of testing. There was a 60-100 ppm difference in the values, sometimes the old unit was lower and the new unit higher, and sometimes it was the other way around. I tested both of them outdoors and noted the value was close to 400 ppm for each. The CO2 reading can be calibrated if it seems off. I did not calibrate it, since the outdoor reading seemed accurate. After a week the old and the new monitor were displaying the same CO2 values. The CO2 monitor is using a photo acoustic sensor. The unit also monitors the total Volatile Organic Compounds (TVOC) and is displayed with five different color indicators, green being the lowest and purple the highest level. The monitor was mostly green during testing, but would quickly go to purple within an hour when cooking. Just boiling a pot of pasta on an electric stove, caused the monitor to show a purple indicator even if it was in an other room. I am more interested in VOCs from paint, flooring, furniture etc. in the home, so this can be a little misleading. The particulate matter (PM) measures pollutants smaller than 1 microns (PM1) or fine, measured in micrograms per cubic meter, smaller than 2.5 microns (PM2.5), and smaller than 10 microns (PM10), or coarse. These smaller particles are invisible, like soot, viruses, smoke etc. and can cause asthma and other health issues. Values below 75 are generally considered safe. All three PM values were showing the same numbers during testing, from 0-5. The values seemed to go up at the same time when the TVOC value was going up. Both TVOC concentration value and the PM values are measured with laser detection. Not sure how accurate they are. The ambient temperature and humidity is also measured and displayed. These values seem accurate, since I compared them to several other devices. The Unni air quality monitor also has alert functions that can be set for CO2 and PM levels. The alerts can be turned on/off. The backlight on the display has two brightness levels and can be turned off by touching the upper part. This monitor can be useful after home renovations or when moving into new places with unknown materials. It can also be useful if living in areas with suspected high air pollution.

We had never paid much attention to CO2 levels, but now that we make our home in a house with ductless heating\AC, ventilation is really important, and other than temperature, there wasn't a simple way to see the quality of air we are breathing. This unit is a simple low-cost solution! It is from U UNNI, who is a quality brand that we really like after using some of their other products, and we had great experience with their quick\very helpful Customer Service. ✅ Not only does it also give you temperature and humidity, but shows your CO2 level history in 4-hour increments over the last 24-hours, so that we can now make sure we get the right ventilation to ensure the highest quality sleep and cognitive function, which CO2 has been scientificly shown to potentially have a serious impact on. Who knew? It is the simplest of installs (just plug in power cord and turn on), has optional battery back-up if you add a few batteries, as well as offers multiple levels of colorful display brightness via a quick touch at top of the screen. If you want to know the quality of the air you are breathing in a workspace, around your kids, or in a bedroom, buy this unit. 👍

Seems accurate, reliable CO₂ monitor with adjustable alerts, suitable for indoor air quality monitoring. Update:It can be powered by either batteries or a charging cable, and the screen is bright and clear. You can easily view parameters by tapping the top of the screen—overall, a practical and effective device.

Surprisingly accurate. I have an industrial monitoring system installed and bought this for outside of my grow area and to see how accurate these better priced readers are. The Non-Dispersive Infrared sensors ensure this little machine can read accurate levels. This is all you need for relatively accurate readings. It is tracking within 40 PPM of my more comprehensive sensor which really surprised me.

Ich habe das CO₂-Messgerät gekauft, um die Luftqualität in meinem Homeoffice Büro und Wohnzimmer besser im Blick zu behalten – und ich muss sagen: Ich bin wirklich positiv überrascht! Die Kombination aus CO₂-Messung, Temperatur- und Luftfeuchtigkeitsanzeige ist super praktisch. Auf diese Weise kann ich auch im Winter mein Raumklima überwachen und Schimmelbildung vorbeugen. Besonders gut gefällt mir das historische Diagramm, mit dem ich die Veränderungen im Laufe des Tages nachvollziehen kann. So sehe ich zum Beispiel genau, wann ich lüften sollte – was sich tatsächlich auf Konzentration und Wohlbefinden auswirkt. Die Messgenauigkeit ist überzeugend und lässt sich per Kalibrierung sogar noch feinjustieren. Auch das Alarm-System mit 5 Konzentrationsstufen ist hilfreich, wenn auch zum Glück bisher selten ausgelöst. Ich finde es super, dass man die Lautstärke des Alarms selbst einstellen kann – keine nervigen Schreckmomente, aber dennoch deutlich genug. Was mir ebenfalls gefällt: Das Gerät lässt sich sowohl per USB betreiben als auch mit Batterien puffern, falls der Strom mal weg ist oder man das smarte Gerät mit ins Wohnmobil nehmen möchte. Die drei Helligkeitsstufe für die Hintergrundbeleuchtung, welche nur über den USB-C Betrieb verfügbar sind, machen es angenehm im Alltag – nicht zu grell, aber gut ablesbar. Ein paar kleinere Kritikpunkte gibt’s aber auch: Die Batterien sind leider nicht im Lieferumfang enthalten, das wäre bei dem Preis wirklich wünschenswert gewesen. Außerdem funktioniert die dauerhafte Hintergrundbeleuchtung nur im USB-Betrieb – im Batteriebetrieb geht sie schnell aus. Und ja, das Design ist jetzt kein Blickfang – eher funktional und technisch. Unterm Strich aber ein sehr zuverlässiges, durchdachtes Gerät, das genau das tut, was es soll. Ich würde es jederzeit wieder kaufen und kann es jedem empfehlen, der die Luftqualität in Innenräumen ernst nimmt – sei es zu Hause, im Büro oder in der Schule.

I bought it based on the reviews, but it was very disappointing, as I already have professional monitor / Aranet4 monitor , and this device CO2 reading is at least 200-250 less reading than the others, even after few days of testing also the Humidity and Temperature reading is very different. In addition of not having an app and just rely on the device. So I would spend a bit more ane just buy Aranet4 or something similar which give accurate readings, Having Application , and long lasting battery life.

Ich bin absolut zufrieden mit dem CO2-Messgerät! Es misst zuverlässig die CO2-Konzentration und zeigt diese in 3 klar unterscheidbaren Stufen an – so habe ich jederzeit den Überblick über die Luftqualität. Besonders praktisch finde ich die Lüftungsempfehlungen, die mir helfen, rechtzeitig zu reagieren und für ein gesundes Raumklima zu sorgen. Das Gerät lässt sich sowohl per USB als auch mit Batterien betreiben – ideal für den flexiblen Einsatz zu Hause, im Büro oder unterwegs. Die automatische abschaltung des displays ist ein echter Pluspunkt, vor allem für den Einsatz im Schlafzimmer oder bei schwachem Licht, den das Display schaltet nach ein paar Sekunden um in einen dunkel Modus. Was sehr zum Vorteil der Batterien ist. Desweiteren nerven die anderen geräte die dauerhaft leuchten. So kann dieses gerät ohne probleme in schlafbereichen aufgestellt werden, ohne das der schlaf durch ein lästiges licht gestört wird. Wen man das Display aufleuchten lassen will muss man nur oben auf dem Gerät die Hand auflegen und es leuchtet auf und man kann ohne Probleme alles ablesen. Auch der Alarm bei hoher CO2-Belastung funktioniert zuverlässig und ist ein wichtiges Sicherheitsfeature. Insgesamt ein durchdachtes und hochwertiges Gerät, das ich jedem empfehlen kann, der Wert auf gute Luftqualität legt. Also alles zusammen kann ich persönlich nur 5 Sterne vergeben. Bin wirklich mehr als zufrieden.