Login

hornychz · 04-12-2018, 06:48

(03-12-2018, 23:32)jarekh3 Wrote: Uff.... First prototype:

Another good job!

jarekh3 · 14-01-2019, 23:02

https://www.thingiverse.com/thing:3356593

hornychz · 15-01-2019, 22:52

This is cutting from my Facebook page (that's the last 22 hours):

(People like it ... Smile

jarekh3 · 16-01-2019, 01:03

(15-01-2019, 22:52)hornychz Wrote: This is cutting from my Facebook page (that's the last 22 hours):

(People like it ...

I'm not quite happy with this project yet.

Firstly, it is quite complicated.
Secondly, it is not possible to connect a CO2 sensor.
Maybe in the spring I will have some time....

werk_ag · 17-01-2019, 23:51

(16-01-2019, 01:03)jarekh3 Wrote: Firstly, it is quite complicated.
Secondly, it is not possible to connect a CO2 sensor.

I agree!
By my experience during the last year, I believe that the best results from the AQM sensor comes when it is well exposed to outside air, but not directly exposed to the weather elements, specially the wind (this is specially important for the CO2 sensor).

Perhaps a simple box, with some ventilation orifices may be enough.
Mine only have ventilation orifices on the bottom side.
We should not be particularly concerned in get good outdoor temperature readings from the T/H sensor used on the AQM. The main purpose of that sensor is give %RH readings, from as close to the dust sensor as possible because these readings are used in PM2.5 calculations (compensation %RH).

jarekh3 · (This post was last modified: 23-01-2019, 19:58 by jarekh3.)

Well, can anyone describe the sensor MH-z19? Where is the intake, the outlet, etc.

[Image: f3eac7c3ae43.jpg]

hornychz · 23-01-2019, 22:37

(23-01-2019, 19:58)jarekh3 Wrote: Well, can anyone describe the sensor MH-z19? Where is the intake, the outlet, etc.

Hi Jarek,

There are many documents on the Internet, for example these in attachement ...
But be carefull, there are two models od MH-Z19B:

jarekh3 · (This post was last modified: 24-01-2019, 00:50 by jarekh3.)

Hi
Thanks, but I need information where the gas is physically flowing. I do not have this sensor.
[Image: 77eea06aded3.jpg]

werk_ag · 24-01-2019, 00:51

(23-01-2019, 19:58)jarekh3 Wrote: Well, can anyone describe the sensor MH-z19? Where is the intake, the outlet, etc.

Hi Jarek,
There is no inlet or outlet. The sensor have two windows which should not be covered or be very near the sides of the box. From my experience, the less exposed to wind the better.

jarekh3 · (This post was last modified: 24-01-2019, 01:01 by jarekh3.)

These rectangular windows?

[Image: 3393aa8cadc5.jpg]

Login
Username:
Password:	Lost Password?
	Remember me