Some things create particles and vocs you might not suspect. 4 stars because there is no standard to my knowledge that assures readings are accurate.

Material looks/ feels good. Display is pretty powerful/ bright, visible in daylight. I blew on it, and the Co2 reading immediately went up, which is a good sign. Planning on monitoring in house air quality, especially sunroom with fireplace (to keep an eye on the effect of fireplace). Wish it also had Co monitor...

I've been using this device for a few weeks and overall it's very useful.It can analyze all important air quality factors and record the data.It has an internal battery to can be moved to different locations without loosing power.The historical data feature is great, easy to see the trends.

I'm using this in my shop, largely as a reminder to keep my space vented when necessary, but I like having the raw information there when I'm just jumping in for a quick project. I'm not convinced the AQI (Air Quality Index) is 100% correct, as I would have figured the lacquer should have triggered an alert but I can clearly see that the sensors are instantly picking up the difference in air pollutants.(**EDIT: after doing a spray lacquer burst of ~10 seconds instead of just a few, it did jump dramatically, and give an audible alarm)

As a self-proclaimed stats nerd, I'm absolutely thrilled with the Simbow CF-20 DL Air Quality Monitor! This device goes way beyond basic air quality readings and provides a wealth of data that satisfies my craving for detailed information.The 7-in-1 functionality is fantastic. Being able to track PM2.5, PM10, CO2, VOCs, Formaldehyde, Humidity, and Temperature all in one device is incredibly convenient. The display is clear and easy to read, with real-time updates that keep me informed about my indoor environment.But the real magic for me is the data export feature. I love being able to download the data and analyze the trends over time. Seeing the fluctuations in different pollutants, correlating them with activities (like cooking or opening windows), and understanding the overall air quality patterns in my home is fascinating. It really lets you take control and figure what steps might need to be made to clean up your air.The device's sensitivity seems excellent. It picks up subtle changes in air quality, letting me know when to take action (like turning on an air purifier or opening a window). The user interface took only a small bit of time to full grasp.If you're a data enthusiast who wants a comprehensive and accurate picture of your indoor air quality, the Simbow CF-20 DL is an absolute must-have. It's well-built, informative, and provides the kind of data that a stats nerd like me truly appreciates! Highly recommended!

I bought one of this and after a week, the AQI level got stuck at 500 and PM readding were at 999. Resetting the machine didn't work so I returned it. The second replacement worked well for two months, but again it crapped out and got the same error, rendering it useless.

Nice and easy to set up. Runs well and is accurate. I noticed that when it gets dust on it it needs to be wiped off or it will keep reading inaccurately. To fix this just wipe it off and then cycle off and then on again and it works fine. I use this in my workshop to help me know the air quality. I like how easy it was to set up and easy it is to read.

Lo utilicé para monitoriar la calidad del aire en la habitación de mi bebé, se me enfermaba mucho de las vías respiratorias y efectivamente había mucha humedad en el aire. Me gustó mucho por qué se puede descargar los datos de las lecturas aunque no estés presente. me gustó mucho por qué lo he compartido con mi familia para realizar monitoreo, me ha funcionado muy bien para mis necesidades.

A primera vista lo noté un poco sencillo , sobre todo por que su peso me parecía muy ligero , ahora bien bastante sorprendido de sus funciones lo instalé en mi departamento sobre todo por el tema de humedades ya que tengo un niño pequeño y mi departamento sufrió varios problemas y el detector de temperatura y CO2 me hacen estar más tranquilos en días muy calurosos o húmedos con lo cual poder monitorearlo constantemente me da la tranquilidad que necesitaba por y para los mejores cuidados de mi hijo , encantado es muy recomendable de momento funciona perfectamente espero siga dando el mismo resultado con el tiempo …

This device includes all of the standard air quality measurements for a quick diagnosis. It undoubtedly overlooks specific pollutants, some of which are fairly common, such as ozone, and others, which are less common, such as radon and radioactivity. However, for day-to-day use, this device exceeds my expectations.For the CO2 level, I compared the readings with another device, and there is no more than a 5% difference in the readings at any given time, which is well within the level of accuracy I would expect. The Simbow Air-Guardian AQ Air Quality Monitor is a multifunctional indoor air quality monitor designed to provide real-time data and analysis of various air pollutants and environmental conditions within your indoor spaces. Here are the key features and benefits of this air quality monitor:Multiple Parameter Monitoring: The Air-Guardian AQ is capable of monitoring multiple air quality parameters, including:PM2.5 (fine particulate matter)PM10 (coarse particulate matter)CO2 (carbon dioxide)VOC (volatile organic compounds)FormaldehydeHumidityTemperatureReal-Time Data: The monitor provides real-time data on the levels of these pollutants and environmental conditions. Having access to real-time data allows you to make informed decisions to improve indoor air quality.Multifunctional: This monitor is multifunctional, offering a comprehensive view of indoor air quality beyond just measuring particulate matter. It provides insights into potential sources of air pollution, including volatile organic compounds and formaldehyde.Easy Calibration: Calibration is essential for ensuring the accuracy of air quality measurements. The monitor typically offers easy calibration options, allowing you to maintain precise and reliable readings over time.Data Display: The monitor often features a clear and user-friendly display that shows all the monitored parameters and their respective values. This display allows you to quickly assess indoor air quality at a glance.Alerts and Notifications: Some monitors may provide alerts or notifications when air quality parameters exceed predefined thresholds. These alerts can help you take immediate action to address air quality issues.Historical Data: The ability to store and access historical data allows you to track changes in air quality over time. It can be useful for identifying trends or patterns and assessing the effectiveness of air quality improvements.Portable Design: Many indoor air quality monitors are designed to be portable, allowing you to move them to different rooms or locations within your home or office for comprehensive monitoring.Data Logging: Some monitors can log and store data for extended periods. You can then review and analyze this data to gain a better understanding of air quality trends.Health and Safety: Monitoring indoor air quality is essential for the health and safety of occupants, as poor air quality can have adverse health effects. A monitor like the Air-Guardian AQ can help you identify and mitigate potential risks.Environmental Awareness: Monitoring air quality is also beneficial for environmental awareness and sustainability efforts, as it can help you identify areas where energy-efficient ventilation and filtration systems can be implemented to reduce indoor pollution.