Huma-i Smart (HI-300) CO2, VOC, PM2.5, PM10, PM1.0, Temperature and Humidity Monitor. App IOS and Android. Sensors made in Switzerland. Export data to computer. Alarm, Notifications and much more.

The actual monitor is quite compact : Width * Length * Height ➡️ 4.06 * 9.14 * 3.81 cm ➡️ 1.60 * 3.60 * 3.81 inches. And it’s quite light at 60g approx.The box of contents comes with the Compact Air Quality Monitor Device, a Charging Cable, a Bumper Protective Cover, a strap as well as a six page booklet of instructions.The booklet advises that the device is charged for about an hour or so using a 5V/ 1 Amp Charger plug BEFORE turning it on or using it. My came 2/3rd already charged.I then took the device out into the FRESH AIR for about 5mins or more as recommended by the instruction leaflet.Although not strictly required, as I was keen to monitor nuisance smells in and around my house, I decided to have it calibrated. Having asked the seller and done a Google search I was able to find the HUMATECH Korean Website and under Community ➡️ FAQs, I was able to establish that the way to CALIBRATE the device was TAKE the device out to a well ventilated place with clean air [e.g. a park], then press down on the ON/OFF Button for about 5seconds. The device powers on and the word “Calibration” comes up. After just under TWO MINUTES (2), the device switches off again presumably calibrated!To turn the device on, you just press lightly and briefly on the ON/OFF button. Within a few seconds, the monitor powers on. The device has up to six screens. [You cycle through each screen by pressing gently on the ON/OFF Button which doubles up as a NAVIGATION BUTTON]. The screens of the device that are of great interest to me are the ones that give a figure for VOC (Volatile Organic Compounds such as Second Hand Cigarette Smoke, Formaldehyde, Benzene and Ethylene) as well as the ones for PM2.5 and PM10 (Fine Particulate Matter Dust) and finally the one that gives the temperature and humidity level as well as the temperature in Celsius and Fahrenheit.The instruction booklet gives a detailed list of the six screens. I was interested though to find out that the RESULTS of the Readings are categorised asGood ➡️ LED Code BLUEModerate ➡️ LED Code GREENPoor ➡️ LED Code YELLOWUnhealthy ➡️ LED Code RED.According to the HUMATECH Korean website, when you’re measuring VOCs or Carbon Dioxide (CO2), it takes between 15seconds and 60seconds for the sensor that measures these gases to heat up and it’s normal for the readings to fall until the readings stabilise. I have used the device a few times now and I think it’s fairly accurate in measuring the VOCs (i.e. volatile organic compound which are harmful to human health in high dosage concentrations over a period of time).WHAT I LIKE ABOUT ITa) It is compactb) It is easy to usec) It measures the potentially harmful to human health VOCsd) It gives the temperature and humidity in a room, reminding us to air the rooms!e) It gives a figure for PM2.5 and PM10 (Fine dust Particulate Matter), which can potentially have an adverse effect on our lungs and breathing.f) It’s not the highest grade VOC Air Quality Monitor (which would be very expensive), but I do believe the VOC Results are fairly accurate!NOT SO KEENi) It goes off after 10mins to save the approximate 60min battery life. [By the way it starts to blink AFTER 9mins BEFORE switching itself off after 10mins of being on!].ii) It does NOT give figures for Carbon Dioxide (CO2), only showing it in graphical form as “Good” or “Poor”.iii) As the components circuitry of the machine is working so hard (you hear a faint vibratory sound) to give you its VERY GOOD RESULTS. I think this drains the battery fairly quickly, especially IF you are using the VOC or CO2 setting.iv) It does NOT store the Readings and as soon as you switch off the device, ALL the Readings are lost.v) There’s no way of transferring the readings to another app or of exporting it to email.I was quite concerned that the small battery capacity of the HUMAI Model HI-150 Air Quality Monitor Machine turns itself off after 10mins. And so I researched the matter and found that IF you want the Continual Operation of the device, you can plug it into a POWER SUPPLY or attach it to a Power Bank if you want to be able to carry it around. I chose the latter and I attach it to the excellent ROSS Compact 10000mAH Battery Capacity Power Bank I purchased on Amazon. (I’m yet to write a review!)Would I recommend the above Air Quality Monitor in spite of its drawbacks (i.e. disadvantages)? YesAnd my reasons1. It’s the ONLY Air Quality Monitor that I found at my affordable PRICE POINT that measures VOCs rather than TVOC (Total Volatile Organic Compounds which consists of benign {I.e. not harmful} and harmful substances).2. It appears to have a very good customer back-up service as evidenced by customer services that had a fairly quick turnaround response to the questions I posed to/asked them via Amazon ASK THE SELLER A QUESTION.3. I can get round/overcome the short battery life by connecting it to a CHARGED power bank.Thank you for reading my REVIEW. I hope you have found it HELPFUL.

The media could not be loaded. For the first month, it was good.Here's what I liked about it.It has a fan, which was reasonably quiet, and draws the air into the sensor to make the device more accurate.The screen is big enough without being a major drain on the power, and it is clear and well laid out.There is only one button, making it simple to useThe device appears to be fairly accurate and user re-calibration is possible.Tech support responded in a reasonable timeframe when I asked them a question about calibration.It has a soft silicon cover with a wrist lanyard which is good when using it mobileThe device cannot be software updated or connected to a phone etc. so no dodgy software to install on your phone, like some of the other monitors from the same company.Temp and humidity seem particularly accurate.Particles too, but not sure about the VOC.Quality generally feels pretty good.It's simple, does what it says.What I don't likeFirst up of course is, it's now broken. After just 6 weeks. But hey, things usually break early or not at all so might just be a bad unit. The fan is noisy at start-up (see video) indicating poor quality fan assembly or just bad luck on this particular item (but others have complained about it too).The large round indicator dot on the main screen is way too bright. It goes yellow, green orange or blue or something (I'm colourblind). A dimmer would have been a nice feature.The display doesn't show values for CO2, just poor fair and bad with a bar-style scale.It's quite thick. small generally (see photo with a mouse, but would have been better if flat.The lanyard is attached to the silicon cover, not the plastic body, which doesn't feel too safe.I am returning mine as it is faulty but I am going to buy another, and as long as that one works well and doesn't get noisy like this one, then I will recommend the device. Maybe I will post again here if the replacement works well.

I don’t like the loud beep when I turn it off.It’d be great to be able to switch of the sounds - they are not necessary

The delivery was as expected, however the Quality Control seal on the box of the item that arrived had clearly been opened before, and the box was a little damaged. I returned it for a refund.

While it's straightforward to use, I can't understand the readings. I go to my parents house which is on an incredibly busy main road, into the room facing the road, can visibly see all the dust that has gathered in the room yet the readings say everything is normal. In my house which is on a quiet cul-de-sac next to a park, hardly any cars let alone traffic and the readings are more or less the same! I'm trying to work out whether there are dangerously high particles in the air in my parents house and I'm not convinced I'm getting reliable readings.

When it worked it was good, but on/off button failed after 8 months - usage was 4 trips away! Despite 2 attempts at contacting company for repair/replacement under guarantee heard nothing. Recommend not to buy this product.

It's a good shape for the desk easy to read. Very easy to set up including Alexa. Have compared it with other Air Quality monitors and it's accurate and responsive, apart from temperature which is 1-2 degrees low. The battery function useful, just for measuring other rooms, short battery life, but it is designed as a desk unit. Only problem when I took it off line to use in different locations didn't log the results when I reconnected, and you pronounce the company very precisely to work with Alexa. The push notification are great letting you know when the air gets bad an when it gets better. Overall very happy.

Seems to work okay with the exception of the C02 monitor which had been stuck on 400ppm since we set it up then suddenly spiked at 3,600ppm and now seems to be broken again. Not impressed considering the purchase price.

I love it; I just put it in my Fjallraven pants' side pocket and it goes everywhere. It has been very instructive to learn just how bad is the air in the New York subway stations! Amazing to think that we have lived so many years exposed to such junk... On the other hand, ignorance is bliss, as they say ;-)

A lot of reviewers seem to be having problems connecting the device to their WiFi network, for me it worked first time, maybe the app has been updated?Same thing with "setting the time" when daylight savings time hit the device did NOT update automatically, but pressing the "time setting" button in the app updated the clock immediately, so while it's not automatic, dealing with DST is pretty easy.They have also added a "delete this device" button to the app in case you need to completely re-setup the thing. The only connectivity glitch I have seen so far was when my internet service went down for a few hours. When the internet came back up the device was showing a blinking "no wifi" icon and did not reconnect to the internet. The device does keep taking readings when there is no WiFi and will dump them all up to the cloud when it gets connected again. I fixed this by powering it off and restarting it, then it reconnected.The device has a large easy to read display with color coding for the air quality dial. You can set it to display one of the quality numbers or flip through all of them every few seconds. You can set it on a desk or it has a screw slot so you can hang it from a wall.At first I thought the device had a problem because the VOC and PM numbers were reading much higher than the air quality meter in my dyson fan. I found the problem seemed to be the desk where I had put the meter. It is a particle board desk so I guess the VOCs and extra dust were being sucked up from the surface. This is a 20 year old desk so I wouldn't think it had VOCs left in it, but when I put the meter on a stand about 10 inches off the desktop, ALL the readings dropped, like VOCs going from .8 down to .15So if you think the readings you are getting seem high, try moving the meter to some other location for a bit and see if they change. Of course it's still not great that my desk is emitting VOCs, but the level in the room really isn't high, it just seemed that way because the meter was right on the desktop.It seems pretty sensitive and can pick up dust from the surface it's sitting on, so wherever you put it you might want to vacuum or dust around it occasionally to prevent incorrect high readings.And of course, just like my Dyson the air quality goes bonkers when I fry up a burger or sear a steak, but that's expected (and a good way to know the thing is working)The battery is supposed to keep the thing going for about an hour, so if you want to check outdoor air quality you can just take it with you for a bit.

J'ai fait un test simple pour valider la sensibilité du capteur : extérieur / intérieur. On voit que les indicateurs montent à l'intérieur et baisse fortement à l'extérieur. Je recommande ce produit.

Llevo utilizándolo varios meses y me convence su trabajo.

Lo puedes llevar a todos lados ,te cabe en la bolsa!