Indoor Air Quality Monitor, IGERESS Formaldehyde Detector, Pollution Monitor,...

In spite of some not so great reviews, I'd have to say I'm pretty happy with this unit. As directed on the on screen prompts, I calibrated the unit and when done took it roaming thru my house , had someone blow smoke at it and drove behind a smelly semi truck. Each situation gave results which I've had expected... Behind the semi and smoke both sent the unit into unhealthful and serious categories. One thing that is apparent is supposed real time actually has about a 15 second display before results start showing so you can't just quickly walk from room to room and if something like smoke pegs the meter at a high value, you have to give it a few long seconds for the sensor to start measuring normal readings again. Moving on, the unit is very easy to set, program, manually calibrate and give offsets if auto calibrate isn't satisfactory. It has decent graphing with adjustable rates of time. Being picky, it would have been nice to have a computer interface but for the price, I'm not complaining. There are 3 very slight annoyances the unit has... Every now and then the unit will drop all values to basically 0 as if the sensor is resetting itself or recalibrating but then continues right where it left off... And the second is the fact it only displays Celsius for the temp not F as we.typically use in the US and time is of course in 24hr format... And last is the fact that the data logging doesn't continue if you leave that screen to view other values. When you return, it starts completely over.

UPDATE: 1-30-19: Be sure to calibrate before each use, if turned off previously. Lots of formaldehyde HCHO (.130) in our zip-loc bag drawer. Also, lots of HCHO by the new shower curtains in my bathroom, but diminishes if I run the evac. fan. END UPDATE. Trying to track down the source of my violent sneezing attacks and my wife's heavy coughing, mostly in our house. We keep the carpet cleaned, and HVAC filters changed regulary. However, with a green laser beam on, in the dark, I see a lot of dust particles! But the PM 2.5 doesn't detect them, as of yet. Only 4 stars because it doesn't have a stand. Otherwise, maybe 5. I ordered it yesterday and got it today. After my near 80 yr. old brain comprehended the setup instructions, and executed them, I searched the house and garage for little nasties. The alarm went off near the garage gas cans! All the readings dropped when placed over my home made humidifier. So far, no nasties found, but it does not like my fresh laundered undershirts!

I do not have a way to validate the numbers but they seem accurate. I imagine this is a concern among many products like this. I initially used it without reading the instructions and it gave me warnings for formaldehyde. I calibrated it using the method describe in the manual and the numbers seem more in line with my hopes. I did use some clorox wipes in front of it and the HCHO readings spiked high for a while in that area. The oven ran at 400 for 40 minutes and HCHO readings spiked as well but this may be a false alarm. It might not be. It is important when turning this on to let it "preheat" in clean air outside of the house and to do the calibration for the first time as well as let it cool off if the box it came in was sitting in the sun when it arrived before trying to use it. It is also important to understand how these types of units work. They have fans that draw in a specific volume of air and are calibrated for that. When you walk around it will increase that volume or possibly expose it to more contaminants and possibly skew the numbers so be sure to let it sit somewhere for 5 minutes if you want accurate ratings. Its also good not to have it directly under a fan or HVAC vent for the same reason although walking with it seems to cause the worst of the fluctuations.

I live in southern Oregon where smoke haze is dense and nearly unbreathable. There are ongoing wildfires in southern Oregon and Northern California. According to the weather data report, AQI was 240 - that is very unhealthy (purple level) in my home area. I went outside on my house foyer to test new IGERESS Air Quality Monitor Detector after I calibrated first. Ten minutes later, the monitor detector read AQI and it said normal (25). It was grossly inaccurate, and I recalibrated again and redo outside twice, and it was still inaccurate - 30 and next 24 as normal AQI. IGERESS air quality monitor detector did not work for AQI. Recharged the air quality monitor detector worked fantastically. The temperature was very accurate, but other measures were questionable and somewhat confusing. IGERESS air monitor detector feels like a plastic toy meter. So, I sent it back for the refund because AQI monitor detector showed inaccurate and unreliable. It was not worth for 95 dollars!

This product i have more as one year. now i know where was my problems with lungs.Thank You company Igeress