Hello

@epierre : after received the PPD42NS, compared to the DSM501A, which one is the best do you think?

Other things, I planned to purchase soon the sensors that I need for my air station.
You made a list on the #1 post, and it's very useful thanks, but now I have to choose between them for each gas targeted (maybe some sensors are still missing on the list below)

Which one appears for you, the better for each gas, with a reasonable price?

O3		    MQ131   MICS-2610    Mics-2614
NO2 	      MiCS-2710    MiCS-2714
NO            ? 
PM10 PM2.5    PPD42NS    SamYoung DSM501
Benzene	   MQ135			
CO  	      MQ307A   MQ309A   AQ-7   MiCS-5525   TGS2442
So2 	      MQ136
COV       	MQ135  TGS2602
CO2 	      MQ135

Ok! Thanks.

And what about the ceramic sensors (like MQ serie). How long can we trust them?

Hello all,

I'm new here, thanks to this topic very interesting for my personal project: a mobile air quality sensor.
(sorry for my english, i'm french)

Fistly, congrat's @epierre and the other, for having shared all this informations!
(it's a litte funny because we had the same idea in the almost same time)
So after having read the entire subject, here my questions (the number in front is the number post):

_
17 - @epierre, I haven't well understand How you can distinguish individual gas from a sensor who react with several gas.

45 - The "Wunder Weather" list that you talked about, it's a website?

55 - What David did you answer to you about "if he speaks of the organic sensor or the ceramic ones"?
Moreover, what are the organic sensors? Have you example?

72- On winsensor.com, an chinese gas sensor producer, the MQ-7 is more powerfull... I don't know who trust, maybe it's not the same?? See the PDF datasheet here.

81 - Where did you read that the lastest one don't speak of HCHO anymore?
After some research, I founded two, one who speak about HCHO here in english , and the other who don't....but I'm not sure (beacause in chinese) here.

Otherwise, for the WSP2110 datasheet, it is here! But chinese too =/

Regards,
Alex.