GZAIR CO2 Data Logger Monitor, Wall-Mounted Carbon Dioxide Detector, IAQ CO2 Detector, NDIR Sensor, Temperature and Humidity, 0~5000ppm Range (CO2 Detection Human/Plant Mode)

I use this CO2 to monitor the level of CO2 gas inside my house. I like the fact that this is a sensitive instrument, measuring the level of CO2 gas in real time. When I'm near the monitor, the level of CO2 goes up as expected, since I'm breathing out CO2 and so raises the concentration of CO2 around the monitor. When the condition outdoors were pleasant, I opened the windows and noticed that the CO2 levels dropped significantly, as expected. It also monitors the current ambient temperature as well as the relative humidity level. The readings of the temperature as well as the humidity level is consistent with another monitor that measures both indoor and outdoor temperature and relative humidity levels. It has a backlight function, which can be activated by touching any of the onscreen function button, which is useful at nigh time or if the lighting is dark. The digits is easy to read and there is also running graph of the monitored CO2 levels for the past several hours. It is powered through the USB port, so it must be connected to a USB charger unit such ones that come with cell phones, which I had plenty of spares. When the monitor powers up for the first time, one might be alarmed by the relatively high levels of CO2 initially indicated. After the monitor has been running for a few minutes, it seems to go through self calibration mode and eventually the displayed CO2 levels drops to the actual measured CO2 levels.

Nice small unit easy to use. Wish I had bought the one with a battery though. I did rig up a portable battery bank for iphone that works well. No complaints about this unit

Útil como una medida de prevención más

Works....but automatically goes 'off/dark' even when the USB is plugged into a power source, which makes it very difficult to read without manually pressing a button to turn the backlight on for a few seconds. Also, the cable is too short, really limiting where you can put it, if you don't want to use batteries. The positive is that the reading and warning light lets you know when CO2ppm gets over 1,000ppm, and you should open up the windows (particularly after cooking with gas) where ppm can easily go >1,500 ppm.

I would like to be able to change the interface to make the details I want to see larger. I watch this through a IR camera to keep an eye on my Plants in my tent. For some reason the screen interface does not allow it to be seen at night by a camera like the 10 dollar Temp and RH gauges.