Air Quality Monitor CO2 Detector Professional Carbon Dioxide PM2.5 PM10 Formaldehyde Temperature and Humidity Monitor w/Audio Alarm Data Export (M2000 2nd) | M2000 2nd, PM2.5 PM10 Formaldehyde, Temperature & Humidity, Audio Alarm, Data Export for Indoor Analysis

I'd tried a few meters before this. They were all rubbish. This one actually seems to work correctly though. I can zero calibrate it outside, and see levels rise in poorly ventilated spaces within a few minutes as the device adjusts. And going outside and measuring it returns to basline levels. This alone is better than any of the other devices I've bought and gives me great peace of mind that it is actually likely to be detecting co2 accurately. if nothing else this device is precise and consistent. Great product, I'll be trusting Temtop from now on, they've won my approval with this product.

I was looking for a Co2 meter and had no clue which one to get. I ended up getting this device because it was inexpensive enough that I wouldn’t be upset if it turned out to be garbage. Once I opened it up and put it to use I was very pleased with the quality of the device. It feels like a very expensive piece of equipment with no play in the buttons and very accurate readings. I couldn’t be more happy!

Good for diagnosing dust levels coming from outdoor sources, and from in house activities like sanding or cooking or running a poorly filtered vacuum cleaner or shop vac. It also easily gives a good asses ent of the function of filter fans or even a face mask with a little cleverness (I am a retired scientist with some background in dust measurements). The formaldehyde sensor is also very sensitive to other oxygen containing molecules, especially alcohols. It does an excellent job of discovering someone drinking wine in the house (or as a too sensitive Breathalyzer). Fun. And is thus also a good way to measure how long it takes for the air in your house takes to be replaced with outside air. The co2 sensor is fun. It nicely detects breathing people. I suspect it might indicate that a small group of people was "unhealthy" based upon the higher CO2 levels. A plus feature for shy people. Serving useful purposes to me and provides fun demonstrations on natural phenomena. The interference of alcohols with formaldehyde detection makes most random indications of formaldehyde will actually be alcohols. But it should be as indicated sensitive to formaldehyde. Its literature should discuss this.

Great customer service. At first I thought the device was defective, but it turned out I was using the power button incorrectly. The seller responded quickly, was very professional, and immediately offered help and a refund. I really appreciate their attention and support. The device works exactly as expected and matches the description provided. Thank you!

The measurements are good, and are consistent over time, but after about 2 weeks the particle count started always reading extremely high in numbers, regardless of the situation. I returned it for a replacement, and the replacement has been great so far! In terms of functionality, I especially like the minute by minute logging, which I haven't been able to find with other reasonably priced particle counters.

I have two of these.... It's so great to be able to know the air quality any where I go. Big problem is that I've lost the charger. Can't locate one that fits this model (M2000C) Help!

There are too many IAQ monitoring devices to choose from, but this one represents a reasonable range of features, and it is especially useful that you can collect history, and actually set the intervals. The history files is USB downloadable, which is extremely convenient. I tend to focus a lot on PM2.5 and many low-end meters seem to indicate too low at the low end of the range. This one seems to be a little better. Still, accuracy at the low end is limited - the specs say +/- 10 micrograms/m3, and if you are trying to figure out a reading between 0-12, which is the "good" range, a swing of 10 points is not very helpful. so caution is in order at the low end, but on the whole it seems to be more credible than many other entries in the field.

Bought this since the description advertised a data export feature. I had researched all the available handhelds and this was my choice. Bad choice! And, I didn't try the feature until the return period was over...my loss of nearly $200!!!!! When I reached out to the company about this, they told me that feature doesn't work on this model. Very deceptive! I will have to take phone photos to record data history to print for my records and/or for sending to others. WHY DOES THE DEVICE SOFTWARE EVEN SHOW THIS OPTION (see photo for proof)? At the time of my purchase, the listing stated data export, I might add. DO NOT BUY!!!!!

Pour l'instant, il fonctionne très bien et semble donner des résultats proches de la réalité lorsque je compare la pollution avec le site météo. En tout cas à ce qui a trait avec les fines particules. Il est très sensible, il y a une rôtie qui a brulé légèrement et j'ai obtenu plusieurs alarmes, CO2, fines et plus grosses particules étaient rendues très élevées. Aussi, excellente communication avec le vendeur.

Es justo lo que necesitaba, obtengo mediciones de CO2 en el laboratorio. El equipo crea un Excel diario y registra los valores cada 30 minutos, se conecta a la computadora y se extraen los archivos.

Perfect for reliable accurate measurements of in or outdoor air quality. Necessary in an age of wildfire smoke and other pollution. Paired it with a HEPA air filter. Measures VOC's, CO2, and PM 10's and PM 2.5"s. C02 great for small rooms full of people, feel drowsy, high CO2 is likely why. This unit displayed the drop in PM particulates in real time as the HEPA filter ran. It also warned of awful wildfire smoke that was bare apparent without the unit. On a commercial aircraft unit displayed CO2 level of 2500, a level violating OSHA and worse, fully capable of making pilots drowsy and slowing their reaction times.

Como se utilizo para el trabajo, se lo dimos al personal y al utilizarlo no daba bien las lecturas, asi que optamos por primero enviarlo a calibrar con un proveedor, el cual concluyo que no se podia calibrar este medidor. Por temas de tiempos, ya paso el tiempo limite para hacer la devolucion, mas no lo recomiendo por no llegar calibrado, no se si asi lleguen todos o nos toco mala suerte, mas creo que la garantia deberia de ser de 1 año para cambiarlo, mas ya no me permiten.

Me gustó que es robusto, y tiene una interfaz intuitiva. El sensor de CO2 al parecer si es NDIR. No me gustó que la 1ra calibración o la requerida después de mucho tiempo de no usarlo dura 6 horas. La batería no dura mucho, así que hay que dejarlo conectado a un power bank porque hay que calibrarlo en exteriores. Tampoco me gustó que no guarda algunas configuraciones al apagarse. Por ejemplo, la de silenciar la alarma. No trae cargador, solo el cable.