Temtop M10 Air Quality Monitor Indoor Air Quality Tester AQI PM2.5 VOCs Formaldehyde Detector for Home Air Testing, US Certified Air Sensor

Awesome product. I love it!

For some time, I have been wanting to collect baseline readings for the air quality in my home. More specifically, I had the desire to collect air quality values for my ceramics studio. As it is in somewhat of a confined space in the basement of a 94-year-old home, air particulates and overall air quality are my main concerns. It was quite difficult shopping for an air monitor that seemed reliable, collected values I was trying to discover, and one that was not incredibly expensive. Throughout the days spent browsing and doing a fair amount of research, I passed on the Temtop M10 several times. However, it continued to be the option I returned to. Two attributes I wasn't satisfied with include: - the lack of being able to display the concentration of specific particulate matter size, less than 2.5 microns. - the above information would only satisfy my own curiosity at this level of monitoring. - the anticipated lifespan of the HCHO, TVOC and PM2.5 sensors. - if I truly need more than 3 years of monitoring, I'll cross that bridge when it comes. The product arrived in two days, and was packaged in a nice, rigid box. Along with the monitor, the box contained an instruction booklet, a ~40-inch power/charging cord (you'll need a wall outlet adapter), and a reset pin. There are specific calibration and acclimation directions, but I don't want to leave the monitor outside in this frigid cold for six hours. The claim is that leaving the device outdoors/indoors, in a well ventilated area, aids in the initial calibration. Here are steps I've taken, instead, and a few things I've noticed: - upon arrival, I took advantage of the monitor's full charge and placed it outside for one hour. - while outside, I gathered some AQI data, specific to my zip code. - the above information was used for comparison with the M10's measurements. - after an hour in single-digit temperatures, the monitor was still fully charged. - cycling through the four displays, I was surprised by the accurate readings. - the readings were within a threshold of accuracy which made me comfortable enough to bring the monitor inside. - for the first six days, I will leave the monitor outdoors (conditions permitting) for one hour. - in my mind, doing this will allow me to track the monitor's measurements, and gain more confidence in its accuracy over time. - as the seasons change, I will send the monitor outdoors, and recalibrate the HCHO sensor. As I have only had possession of the M10 for three days, I speak with limited experience. It has been positive, thus far. The M10's display is bright, and easy to read. The sensors are quite sensitive to fluctuations within the monitored environment, and seem to be accurate enough to trust as a basic gauge for collecting data. The battery life is decent enough for my needs. My preference is to leave the M10 plugged in. I currently have no other devices for measuring the air quality in my home and studio. I do have CO/smoke/gas detectors and a hygrometer, but nothing to compare to the M10. There are no purification systems present in my home or studio other than the furnace and air conditioner. The Temtop M10 is my first air quality monitor. If you are searching for an affordable device to use for gathering some basic information, I'd say the M10 is a solid candidate. This is especially true if your desire is to collect air quality values, with the need to escalate your response/air purification being in question. It may help put your mind at ease, or provide information valuable enough to make future decisions revolving around mitigation.

I was wondering how my gas range impacted my indoor air quality, so I bought one of these (P10) and put it in my kitchen. It reacts quickly when I start cooking. I discovered that my hood does a good job of keeping my air clean when I'm using the rear burners. The AQI barely changes at all. However, the AQI spikes when I use the front burners. The hood only extends out over the rear burners, so this makes sense. Another interesting thing I learned is that the hood works just as well on the low setting, which makes significantly less noise than the high setting, so now I can have a quieter kitchen when cooking on the rear burners. I rarely use the front burners anyway, but if I do, I open the windows now.

I really wanted to like this product. After the required 6 hours of ventilation, I turned it on, and it provided what I can only assume are relatively accurate air quality readings for a few hours. As expected, indoor AQI was between 20 and 30, even improving to 16 in front of an air purifier. This accuracy, unfortunately, did not last. The battery ran down and the unit turned off. After a recharge, on the second day, in the same conditions, in the same locations, the AQI immediately shot up to 165 and stayed there. I ventilated the device again and reset the calibration as instructed, only for the AQI to never get below 50 even in pristine conditions. TVOC numbers are off the charts, but PM2.5 readings seem reasonable. Other than accuracy, battery life is short probably due to ridiculously high screen brightness which is not adjustable. Final verdict: This device is good as a classroom provocation, or as an awareness raising tool, but due to questionable accuracy, is mostly just an expensive paperweight or just an okay PM2.5 meter.

Because of wildfires, the outdoor air quality where I live has been pretty bad. So I bought this monitor to see what my indoor air quality is like and whether or not my air purifiers are doing their job. When I put this monitor outdoors, both the PM2.5 readings and the AQI readings are very close to the readings that nearby Purple Air monitors are showing on the Purple Air map. (To check the PM2.5 readings, you need to change the default Purple Air map display from AQI to raw PM2.5 readings.) Considering this monitor costs about a third of what the Purple Air outdoor monitors cost, I think that is pretty good. This monitor, of course, doesn't have the wifi connectivity that the Purple Air monitors have, but that's fine with me. Another potential drawback is that it you can't use it to continuously monitor air quality unless you have it plugged in because the battery life is pretty short. But, again, I don't consider that to be a huge drawback. The only thing this doesn't have that I wish it did have is the ability to sample at set intervals and keep a history of the results (for example, at night while I am sleeping). However, I think you'd have to pay considerably more for such a feature. So all-in-all, I am pretty happy with this little monitor.

Overall I like this product. It seems to give pretty accurate AQI and PM readings compared to local readings. The display is easy to read and battery life seems acceptable. However, the HCHO readings appear to be way off and fluctuate with other "odors" that are not formaldehyde. Same can be said with TVOC. Many things trigger a high TVOC including breathing on the meter, exercising and then picking up the meter, vinegar, and pretty much anything that smells. So one must understand the limitations of a TVOC meter that picks up harmful and "non harmful" gases. I have another formaldehyde meter that was reading almost zero while this meter was reading well over 0.5 mg /m3. In my opinion, I can understand why TVOC readings pick up lots of things but if the meter is specifically saying it is looking for formaldehyde and readings go up when it is not formaldehyde, I believe this is an issue. I wanted to clarify how I came to the above conclusion so I decided to add this additional information and I hope this is helpful. I had noticed the TVOC and HCHO readings appeared to be "off" so I wanted to run some additional tests I have a room that would get high TVOC and HCHO readings as the day would go on. After the readings went up, I brought my EJ120 air purifier in the room. The HEPA and Carbon filters in this air purifier were only 3 months old. After running the air purifier for several minutes, the readings, according to the Temtop, in the room actually went up! I tested the air coming directly from the air purifier and got even higher readings. I replaced the 3 month old Carbon filter with a brand new Charcoal filter and I had the same results the next day. I then ran another test the next day with an air purifier that has a solid state formaldehyde sensor and removes formaldehyde. This air purifier was giving me good readings for TVOC and HCHO and it was brand new. The Temptop was still giving me high readings for both. I turned the new air purifier on high and readings on the Temtop went up while the air purifier sensors were giving good readings. I ran similar tests after resetting the Temtop and got the same results. As I have used this device longer I have also noticed there is a correlation between HCHO readings and TVOC. I suspect HCHO is derived from the TVOC reading. When TVOC is .85 HCHO is .14, .87 /15, .89/16, 1.00/18, 1.12/20, 1.99/21, 1.51/28. I understand formaldehyde is a TVOC so it should affect the TVOC readings, however based I what I am seeing, I feel the HCHO readings are being "implied" based on the TVOC readings and they are not actual direct measured readings. Just my observations for what they may be worth.

my review is for M10i [monitors AQI, PM2.5, HCOC, TVOC (with WiFi)] This meter helped me provide critical data to my landlord, doctors, city about a difficult situation where my neighbors' illicit activity severely impacted my health, but was otherwise difficult to quantify and verify. It's been invaluable. I use Temtop's app on an iPhone, and have used three different WiFi setups. I 100% recommend reaching out to the manufacturer's team when you encounter difficulty connecting, they have been exceptionally helpful, and wow, I ended up with a lot of questions, and they have been consistently wonderful in helping me find the solutions I desperately needed. It can take time to attach this meter to WiFi, but here is what I learned: • have all your phone's permissions set allow the Temtop app to do what it needs to do • have set your WiFi network & router permissions set allow this meter to connect to your 2.4 GHz WiFi • Use 2.4 GHz WiFi, not 5 GHz WiFi. Temporarily hide or disable everything except 2.4 GHz. Call your ISP for help if needed, and permanently blended WiFi routers won't work. • Temtop's amazing support folks recommended that I temporarily disable all but one of my mesh routers on my network while I connected my meter to my WiFi. This worked! Meter automatically re-connects to WiFi after either meter or router are restarted. Temtop's app exports the M10i meter's numerical data as an excel spreadsheet if you ask it to :) The most frequent output is 1 reading per minute. The app's graphs are wonderful and you can zoom in to time/amplitude easily. It's a very helpful and cost-efficient meter, and has made my life significantly safer, given the situation I needed to be able to monitor.

This TEMTOP M10i WIFI AIR QUALITY MONITOR (for PM2.5 TVOC AQI HCHO; Real Time Data Recording) works well, and seems to be accurate enough for my purposes. When I opened a bottle of nail polish in a nearby room, the monitor’s HCHO (formaldehyde) and TVOC (total volatile organic compounds) numbers shot way up. They returned to more normal levels after a few hours. In fact, I liked this device so well, I purchased another, to keep track of the air quality upstairs as well as downstairs in my home. At first, I had difficulty getting the second device recognized by the app and connected to my home network. However, it IS possible to have two wifi devices displayed in the app. Once the devices are set up, they display separate real time readings, and keep independent data histories. (See my photos--one of them has been enhanced a little to make the figures and the device names “Air Quality” and “Air Quality 2” easier to read.) CONNECTION TIPS: The key things to know about the wifi setup are as follows: (1) your phone or tablet (with the app) has to be connected to a 2.4Ghz network; (2) the Temtop monitoring device has to be reset with a paperclip so that you see an “ascending” wireless signal (not just a blinking wireless signal), when you’re joining the home network; and (3) any other Temtop monitoring device already connected to the network should be turned off when you’re connecting the new device. I’m not positive that step 3 is required, but my second device would NOT connect to my network until I turned the first device off. After you get the Temtop devices connected, you can reconnect your phone or tablet to a faster 5Ghz band, and the Temtop app will still work. AIR QUALITY HISTORY TIPS: First, the air quality history comes up in the app when you tap the area that shows the real time readings. Second, if you try to bring up the history and you see “no data”, you may have to (1) turn the device off and on again, and/or (2) log out of the app and log back in again. Clearly, it would be nice if the app were less “uppity”, but the air quality monitors seem to be quite responsive to changes. My upstairs monitor shows consistently higher TVOC readings, for example, because the upstairs has more shampoo, Lysol sprays, etc. in regular use. Once an aerosol spray gets into the air, it will take several hours for it to clear. Also, it would be nice if the app could be set to show local temperatures in Fahrenheit rather than Centigrade. That’s a quibble, though. I haven’t owned my two devices for very long, so they may stop working prematurely (as other reviewers have reported). However, I’m happy with them so far--especially with the real time and historical data available through the app. You can use the app to set your device to record data at certain intervals--starting at as often as every 10 minutes. I do have to keep the devices plugged in all the time, because the battery drains so quickly. The battery doesn’t last anywhere close to the promised 6 hours.