Review on 🌬️ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology by Mark Jefferson

Good CO2 meter. This meter allows me to monitor indoor air quality and alerts me when ventilation is needed. INTERFACE: The interfaces and buttons are not so easy to set up the parameters without reading the manual. I had to read the document carefully to 1) adjust the GOOD/NORMAL/BAD CO2 settings, 2) turn off the beeps, and 3) change the time and date. The default time and date set in the device was in the Chinese time zone, so I assume it's not just a Chinese manufacturer. This makes me question the durability/reliability of the device. Let's see how long he lives. SIZE: I thought it was the size of a smartphone, but it's actually a lot bigger. The diameter of the front is about 5 inches and the back is round, resembling a hemisphere. POWER: The power supply shows 5V and 0.6A, so the power consumption is less than 3W, which is good. , the adapter does not get hot, even if the device is switched on all day. CO2 MEASUREMENT: The monitor updates the CO2 readings at an average interval of approximately 2 seconds. Speed when the CO2 level is changing rapidly (with an interval of about 1 second), or otherwise it updates with a period of about 3-4 seconds When I breathe or blow directly in front of the device, I see spikes in the CO2 Salary. But there is a slight delay, so the CO2 reading increases about 5 seconds after the puff.