CO2 Data Logger Monitor, IAQ CO2 Detector, Dual-Channel NDIR Sensor, Tabletop Carbon Dioxide Meter with Data Export, Temperature and Humidity, 0~5000ppm Range

GZAIR Model 2 Indoor CO2 Meter, Temperature and Relative Humidity Carbon Dioxide Detector is portable, but amazingly helpful device, permitting to control in real time and monitor up to 7 days in a row quality of the air in your house. Such control is especially significant if you have in your kitchen gas stove. In wintertime and with closed windows in the house working gas stove consumes a lot of oxygen and concentration of carbon dioxide in the air in your house can quickly reach unhealthy level and have harmful effects. We know this from our own experience and GZAIR Model 2 Indoor CO2 Meter helped us to find culprit. I strongly recommend using this device for monitoring level of CO2 in the rooms of your house, including children’s bedrooms.

It's super easy to use, logs the data for a very long time and shows it in a graphical view which I love.It's fairly accurate when I compared against other devices, and super responsive to fast changes in the CO2 levels.I do recommend this product.

I missed the detail of how small it was but the readings are legible when at close range. Not sure if it got an audible alarm but the readings go red when at critical levels is fine. Works for us in our facility.

If you want to download your data, first make sure you set your data and time (it apparently correctly changed with Daylight Savings Time by the way). After an hour or so to make sure you have stable readings, go to History and Reset to erase the data that so you start with a clean slate (it would probably be erased if you recorded long enough, and you could clean it up in a spreadsheet, but I think this is easier).Following the instructions to Export the history data to a DATALOG.TXT file worked fine the first time. But I ran into problems when I tried to upload a new data set after having rest the data and logging another week's worth. I plugged it into the USB port in my computer and saved the data to file on the unit. But when I imported it. for some reason it kept giving me the old data whether I tried importing into Excel directly, or opening the file on the USB device with File Explorer. Perhaps it's just some issue with my computer, but I finally got it to work by plugging the device into a wall socket, exporting the data, then plugging it into the USB port on the computer.One person in the comments complained that it only logged the data every hour, but mine logged every 15 minutes.

Update:It stopped working after a year. Reads 300 all the time. When you review the log it has different valves than 300. I think it just isn’t displaying the right info.Original:I placed it outside for an hour on a windy day. It read 502. So I consider that the baseline. It averages 550’s in the house with a window open. With the house closed up it reads in the 800’s on average. In a closed room it will hit 1600 with one person in there. I start to feel tired at about 1400.Device may not be 100% accurate but it gives me an indication of what they level is close too.I no longer have the afternoon tiredness I used to have. I just open the window.

I used this to monitor indoor air quality during the recent California wildfires, which required us to keep our windows closed.The device is easy enough to set up, and it is small and unobstrusive. The readings are comparable to those from a more expensive sensor, so it seems accurate enough.It doesn't have any kind of IoT or app integrations. At first this didn't really matter, but I have grown used to app integrations with my other air quality monitors, so I am starting to miss it now.

bought 2 -- one was DOA.both cords and both chargers turned on the first unit.the second unit would not power on at all.for our purposes (using two units) having only a single device is of no use, and doing returns/exchanges right now is not just inconvenient ... it is quite a delay, and we don't have much confidence that we can trust the next unit's readings.probably just will return *both* instead of sitting here wondering when the next dies.WHY SHOULD THE END-CONSUMER BE YOUR ONLY QUALITY CONTROL? #doa

A very servicable tool to measure CO2. A decent touchscreen based UI with a nice chart facility. One design suboptimality: the CO2 sensor is mounted on the back half of the housing, while the rest of the internal computer is on the front half; they are connected via a pin-and-socket system. The two halfs of housing are held together by a single screw, which means a motivated youngster can pry the housing apart and thereby disconnect the CO2 sensor. Easy to fix, just a hazard of life with youngsters I suppose...

Tiene que estar fijo y enchufado a corriente eléctrica; no me gusto que no lo puedas llevar a donde vayas. No tiene pila