SMILEDRIVE® Portable Air Quality Pollution Meter Detector for Formaldehyde PM 1/2.5/10, TVOC, HCHO-Indoor & Outdoor Use

Very nice product, It detects every small change in air quality in all three category, HCHO, PM2.5, 1, 10 and TVOC. I found TVOC is very important highly sensitive. Checked it with air purifier output to determine efficiency of different air purifiers. It is very useful compact and important product, worth paying the price😀Thanks

Having this meter for more than two years. It worked fine for sometime. Now its battery drains out fast and readings on the meter are not reliable. Also found that the battery is non-replaceable and there is no repairs or after sales service available.

Stopped working after 8 months of purchase. When it worked it displayed PM 1 and PM10 values based on a programmed formula set on the detected PM 2.5 value. There are no separate sensors for PM 1 or PM10. Not value for money.

These days air pollution is a major problem and many times we think there is less indoor pollution but we can't be more wrong in that. This pollution meters helps in determining the level of indoor pollution and I also have air purifier so it shows air purifier's accuracy too. Even though I do not doubt that it is working properly but I have noticed something in the readings. It shows readings for PM 1, PM 2.5 and PM 10 particles and some other gases like HVOC etc. What I have noticed is that readings for PM 1, 2.5 and 10 vary in same order means PM 1 reading is always less than PM 2.5 and PM 2.5 reading is always less than 10 and according to outdoor pollution the readings vary accordingly but they always maintain this order. So readings are always in this order PM 1 < PM 2.5 < PM 10. But when I check pollution monitoring websites they sometimes show PM 2.5 reading more than PM 10. So I don't know why is this in this meter. Other than that its all good and it shows proper reading like on a clear day readings are very less and on polluted days readings are more. Also it shows high readings when you burn something like incense inside or cooking something in kitchen and fumes fill the room. So overall its a good product to have.

Air pollution is a real risk to health now. Most air purifiers do not have an accurate AQI measurer. Air Quality measuring instruments are generally based on laser-egg technology and are expensive - 20k inr upwards. This instrument uses a semiconductor technology and makes measuring air quality more affordable. Since air quality can vary locally, city based AQI readings are not very useful. If you are fussy about exactitude then this portable instrument would give you info - be it indoors, outdoors, inside vehicles or wherever you spend substantial time. This is also a good check to measure the effectiveness of an air purifier.

One of those two is not accurate. Either Kaiterra is doubling the measurement, or Smile drive is dividing it in half. I can only guess and compare to independent online outcomes. Both of them I'm using for more than a year. Short battery life

Value for money and very accurate and quite useful for those people who are living in polluted states like Delhi

Difficult to use this instrument. One display segment is very low, can go off any time. Not worth the money