Which dust sensor do you use and why?

[Nca78]

@vladimir said in Which dust sensor do you use and why?:

@gohan tell me please, do I need a special sketch to use it? Or they all work on the same principle?

It's working the same way than Plantower sensors, serial communication at 9600 bauds and sending the same data structure with the same checksum calculation, just with less data (only measured PM2.5 and "calculated" PM10 based on PM2.5 measurement).

[alexsh1]

@vladimir The answer is it depends. If you are happy with +/- 40% error, you probably be better of with a generic dust sensor. I think the best would be if you do a bit of research online. This is would be a good start - http://aqicn.org/sensor/

Personally, I moved from a cheap sensor to Plantower PMS7003 (about $23). The amount of time one spends in calibrating and understanding cheap sensors, is just not worth it in my view.

[vladimir]

@alexsh1 Plantower PMS7003 this sensor need not be calibrated? Is it accurate enough?
Unfortunately I have some problems with understanding English.:confused:
My GP2Y1014AU0F sensor now shows a value of about 150 units. As I understand, this is absolutely not the right value for the apartment.

[alexsh1]

@vladimir можно на русском и в личку ;))

[vladimir]

@alexsh1 :smile: :+1:
Wrote in the chat.

[NeverDie]

I just now hooked up the PMS5003. Incredibly easy. Regarding the OP, it says the particles in my living rooms are:
Concentration Units (standard)
PM 1.0: 5 PM 2.5: 8 PM 10: 8

Concentration Units (environmental)
PM 1.0: 5 PM 2.5: 8 PM 10: 8

Particles > 0.3um / 0.1L air:894
Particles > 0.5um / 0.1L air:286
Particles > 1.0um / 0.1L air:61
Particles > 2.5um / 0.1L air:2
Particles > 5.0um / 0.1L air:0
Particles > 10.0 um / 0.1L air:0

The above is from using the Adafruit library.

I don't see how the PM numbers can be right though. I mean the particles >5.um is 0, yet the PM10 is 8. How does that make sense?

[NeverDie]

Hmm.. Looks like the Honeywell may not provide the actual particle counts, but just the PM number? If so, that makes for a much coarser measurement. Also, interfacing to the Honeywell is a bit more involved. You have to request measurements. They don't just arrive on their own.

[Nca78]

@neverdie said in Which dust sensor do you use and why?:

Hmm.. Looks like the Honeywell may not provide the actual particle counts, but just the PM number? If so, that makes for a much coarser measurement. Also, interfacing to the Honeywell is a bit more involved. You have to request measurements. They don't just arrive on their own.

They should, by default it's supposed to send measurements at regular intervals.

[korttoma]

@neverdie

Just received an Plantower PMS5003 allso, do you have a "MySensors" sketch that you could share?

[NeverDie]

@korttoma I haven't connected it to mysensors. At present, I'm just using it to explore emissions from my 3d printer and how best to filter them.

[gohan]

@korttoma if you have a library that can read the values from the sensor, you can easily add the mysensors code

[korttoma]

@gohan said in Which dust sensor do you use and why?:

@korttoma if you have a library that can read the values from the sensor, you can easily add the mysensors code

yeah I know, I just thought that if @NeverDie already made a MySensors sketch I would not have to invent the wheel again.

@NeverDie what lib are you using and how? I2C?

[NeverDie]

@korttoma Adafruit library. It communicates over UART.