Temtop S1 PM2.5 Air Quality Monitor & Indoor Thermometer

I've had it for 6 months and it has mostly hovered around AQI of 1 or 2 occasionally up to 20 making me wonder if this thing is working. Then the wildfire smoke from Canada hit Ohio and air quality is all over the news. Today I can see the fog in the air and this shows AQI 75 inside where I always run air purifiers. I set it outside, AQI jumped within a couple minutes up to 265. Brought it back inside and jacked up the 3 purifiers from low to high, indoor AQI went down from 75 to 67. This is all very useful information for respiratory health.

Stays charged great, love having it in the kitchen for measuring air quality.

Love this item

Let's me know my current air quality in my apartment. Does a good job.

I've had this for a few months, and lately the numbers get stuck (I know they are wrong) every few days. It's fully charged, smart mode on. Turning it off and back on seems to fix it, but I don't like not being able to trust it.

Not accurate at all. I bought two, placed on in a bedroom, and the other in the living room. One was reading 06 ųg/m3 and the other 20 ųg/m3z. I left them in each room for about an hour. I then swapped them to test if the measurements would adjust to swapped rooms, but they remained the same after an hour I also have a 3 high-quality hepa filters with air quality measurements, and I trust them - those readings fluctuate and these numbers on this product do not. For example, if I sweep, pour cocoa powder into a bowl, or spray an air freshener, my hepa filter will immediately detect those particles and the displayed measurement will increase (thus upping the hepa filter fan speed) but these devices do not detect changes in the air at all. I’m not sure that these are good for besides temperature. A subpar and completely unreliable product if you’re looking for air quality measurements.

As an immunocompromised traveler, I appreciate having AQI, temp, and humidity info at my fingertips with this compact device. It quickly displays AQI, works quickly & seamlessly with purifiers, and its design is space-saving with a magnetic back.

I'm getting pretty accurate readings for PM2.5 and AQL with my air purifiers and air humidifier. I also noticed a marked difference with my AC filter also

It does seem to provide pretty accurate PM2.5 and air quality readings. At least, these jibed with the one-word weather descriptions of Accuweather, a weather forecasting service. But will still need to try it out more to ascertain if it’s really accurate over a spectrum of air quality conditions. As of the first series of readings though, it did well.

This air quality monitor is working perfectly fine. I have seen some comments saying that it is not stable but I have tested it in multiple scenarios and it is working perfectly fine. I have recently bought an air purifier. Before turning on the air purifier the AQI was around 85 in my room. After 10 minutes of running the air purifier at full speed the value dropped to 25. I also tried it in multiple places during multiple days and the values looked consistent. I think this is a genuine product. I am attaching a few images captured at different locations. The only problem I noticed is when we use it directly under the sunlight it is giving a lesser AQI value. I think they have also mentioned this point in their manual, saying that direct exposure to a light source can alter the values. That is the only issue I found with it but for internal use cases it is great and really content and the battery life is so good. I have been using it for almost one week and even a single bar has dropped on it. Just to clarify I have been only using it on and off for short durations to test the AQI. I haven't left it turned on but even with this I think the battery life is really good.

Estaba súper escéptico al comprar este producto por las reseñas que he visto. Algunas dicen que no le dura la batería. Otros que no es exacto. Otros que se traba y ya no mide más. Después de una semana de usarlo… la batería le ha durado impresionantemente mucho. Si lo considero sensible ya que sí marca diferencias cuando cambias de cuarto o cuando sales. Inclusive me lo he llevado a casas de amigos para medir en diferentes lugares y verdaderamente mide más contaminado en donde sí está más contaminado y también mide menos contaminado cuando ya tengo el purificador de aire prendido durante algún tiempo. Lo único que no me gusta tanto es que es más exacto cuando lo prendes y apagas porque. Vuelve a medir desde 0 pero bueno, al final mide y es lo que importa. Tiene un margen de error de más menos 5 y como dice en el instructivo: al final es un producto para medir en casa, no es profesional ni la herramienta más fina es para que te des una idea. Lo recomiendo ampliamente y le dejo las 5 estrellas para complementar tantos malos reviews con los que no estoy de acuerdo para nada. Update: Estoy aún más contento con el sensor porque me lo he estado llevando a diferentes lugares. Me lo traje a un lugar que es un bosque y el aire supuestamente está muy limpio y al llegar lo encendí y ciertamente lo marco limpio. Pero luego el vecino empezó a quemar basura y cosas (malamente) y al mirarlo subieron los niveles de 12 aqi a 140 aqi. Realmente funciona y sí reacciona en un rango de tiempo realmente rápido.

It’s a good air quality monitor but it updates in real time only when it is plugged-in. Though the battery lasts very long, the PM2.5 and AQI readings take a lot of time to update (more than a few minutes). Temperature updates in seconds even on battery. You have to keep it plugged-in if you want to see PM2.5 and AQI getting updated in seconds. Have compared with readings on air purifier and the readings are close, so appears to be accurate with 10% error as claimed.

No sirve.