Air Quality Monitor Indoor, Yvelines Test CO2/Formaldehyde/TVOC/PM2.5/PM10, Multifunctional Air Quality Tester for Home Office Indoor (Grey)

I heat my house exclusively with firewood, so I suspected I had poor quality air inside my home. The Yvelines air quality monitor helped me identify the kinds of poor air quality inside my home and more importantly the solutions. My solutions are putting a larger air filter in my living room, a smaller air filter in my bedroom, and periodically opening my windows a wee bit regardless if the temperatures are below zero. The Yvelines air quality monitor helped me choose the best locations for my new air filters. Kudos to Yvelines for responding quickly to my two inquires. 1. Yvelines emailed me a large-scale air quality reference table after I requested one. I printed the larger font air quality table and keep it next to my monitor when it's on. The table that come with the Yvelines monitor was too small and difficult for me to read. 2. Yvelines also let me know that the monitor should be off when charging.

I’ve just received it & it is charging. The instructions are almost non existent. The ones that do come with it are very small & partially written in light blue ink making it very difficult to read there is no scale so you can evaluate results.

This air quality monitor is very sturdy in its design and very sensitive. The numbers keep changing constantly, and it takes some time to get used to using. I wish the instruction manual was more clear and in depth. But my dad really likes this thing and the stand makes it easy to place anywhere in the home. It detects and measures various harmful pollutants in the air, and the LCD display is very easy to read.

It shows too low level of pollution compared to accurate data.

Imagine a schizophrenic man walking down your street, yelling random numbers. This unit is no more likely to give you a correct value for PM 2.5 than he is. Sure if you blow cigarette smoke at the device, the numbers will rise dramatically. But I already knew they would. I need a device that can tell me if the value of PM 2.5 in my room is 3 or 30 and this one can't. It is just not responsive at typical indoor values of PM 2.5. The Yvelines unit does not measure accurately against government stations, nor does it respond to changes in the room such as turning on a high quality air purifier (Winix 5500-2 if you are looking). It actually displayed a value of 23 for PM 2.5 the whole time as my other detector displayed a change from 30 to 3 as the air purifier did it's job. Take a look at the pic. If your interest in this unit is for the HCHO, TVOC and CO2 then the news is a little better. If you don't move the unit around, it will generally display what seems to be an accurate value for each. Trouble is that generally, if those values are high you usually already know that about the air quality based on inference or your nose. Often those values would get out of whack (made obvious by the CO2 number climbing rapidly for no reason). This necessitates periodic 'recalibration'. No big deal, hold down a button and you'll have accurate values again in 2-3 minutes. If you are concerned by PM 2.5 in your home, my advice would be to spend your money on an air purifier instead. If you are looking to see how well your current air filtration is working, this Yvelines unit is not sensitive enough to give you any useful information. You can find a much better PM 2.5 detector here: https://www.amazon.com/gp/product/B07DL1M46J/ref=ppx_yo_dt_b_asin_title_o01_s01?ie=UTF8&psc=1 I like the fact that Yvelines tried to combine so many detectors into one portable, affordable device. But when the values it provides do not track reality with any precision, it is worse than useless. Returned.

This product is highly effective at identifying possible toxins in home. I was shocked when It identified a slight amount of toxins in my home. This device is pretty easy to use just turn it on let it adjust and it identifies if there are toxins in the home. If I would be asked if anything could have improved I would say the product information and instructions could have been more in-depth info on the possibility toxins what they are etc I had to resort to looking up on the Internet. But other than that it was a well worth every penny to ensure my families safety and health. i highflying recommend this product.

Appears to work but without a standard for comparison it's difficult to tell. Basically all readings are in the "Exceptional" range (meaning good) except for CO2 which is always in the low 500s (not exceptional but Ok)

Just received item and have not fully charged it yet but the ‘manual’ is VERY limited. Including charging instruction at start up. Very small lettering. Had to enlarge for easy viewing. More to follow as I begin to actually use the product.