PerfectPrime AQ9600

It's difficult to rate a device, the accuracy of which cannot be easily checked. The Amazon ad states accuracy of 10%, but the handbook supplied gives 20%. I wanted the meter to compare different environments and effectiveness of filters. For that reason absolute accuracy is not so important. I'd be more than happy if the device was anything like 20% accurate. To test if it was giving anything like reasonable readings I used cigarette smoke from a single cigarette in a sealed room. Fine particulates (0.3um to 0.1um) from cigarettes is well documented. I found number of particulates to be within a factor of two of the theoretical level. Given the various uncertainties in such a crude experiment, I see that result as very satisfactory. On the negative side the accompanying manual is clearly translated from Chinese, and is very unclear in places. The section on "calibration" is, to my mind, totally unintelligible. Some other items in the Amazon ad don't seem to make sense; the sampling time is fixed, not variable as stated. Charging can be by the supplied transformer (American plug) as well as USB. Manual says 999 samples can be stored, not 2000 as in the ad. I have "played with" several of these relatively cheap particle counters and I have to say I have the greatest confidence in this one. To have high confidence you have to spend well over a thousand pounds on a device, so if you're looking for a decent affordable device for comparative home use then this should fit the bill.

Nonostante il costo decisamente economico, il prodotto è di ottima qualità e svolge correttamente il suo lavoro. Anche la precisione non è male… Abbiamo eseguito prove di comparazione.

I bought this thing right before the Canada wildfires caught up with us in the northeast US. The picture above was after a few readings to get things stabilized. This is most deffinitly not a normal reading. I am in no way a professional, I just needed something to tell me whether my flow hood was blowing sterile air or not. For these purposes, this device seems to be fantastic. It reads zero along the inner square and starts to show small particles along the leading edge where the flow would whip around dirty air. The 50 second test time is fine, it gets the job done as long as you leave it completely alone during each run. I can reliably mark off my work area with this tool; I've had remarkable success working with cultures within this clean air bubble. I had purchased another similarly expensive unit that was not nearly as accurate as this one. So far so good.

Ich habe kein Teures Marken Vergleichsgerät um die Angaben zu überprüfen ob sie stimmen. Brauche es in erster Linie für mein Luftreiniger daheim um den Filterwechsel rechtzeitig vorzunehmen, und da liefert er mir gute Dienste.

Ottimo

I don't know, but suspect, that there are people, like myself, who purchase this product wanting to read/manage particle count (mold, voc) in their environment. Upon opening the box I was assaulted by a heavy stinking voc wave coming from the unit. Made me instantly ill. Left the unit outside overnight and it still heavily stunk the next morning. Having to smell it twice (once upon opening, again the next morning) made me quite ill for a day. I suggest to anyone considering purchasing this product to manage their air quality - DON'T DO IT. Placed one star only to be able to post this review. Should be 0.