Enclosure for Honeywell HPM-series PM sensor

[secantscope]

Hi all,

I'm new to this forum, but this place seems really interesting. So very high chance you'll see me again around here!

For a project we're currently looking at the HPM-series particle matter sensor from Honeywell:
https://sensing.honeywell.com/sensors/particle-sensors/HPM-series

This seems to do everything I want, and it's even suited for use in harsh enviroments (see link above).

However: i don't think we are supposed to place this sensor outdoor just like that in the open air? There should be some kind of enclosure around this, right? I would need a protective case that fits the sensors air-intake and exhaust openings and my waterproof connector. Been googling for quite some time but there's no cases on the market for a sensor that seems quite popular...

What would you recommend? Thanks in advance!

[Yveaux]

@secantscope hi! And welcome to the forum!
This page (in German) gives some inspiration: https://luftdaten.info/feinstaubsensor-bauen/

[Nca78]

Haha I didn't notice they now had those 2 "compact" models, obviously based on the Plantower PMS7003 (similar shape, similar vent position, similar connector). They seem to improve the hardware to make them more robust, but what I don't get is the decreased accuracy compared to the original models (PMS7003 and PMS5003).

For enclosure, another option is a radiation shield.

[secantscope]

Hi Yveaux and Nca78, thanks a lot for taking the time to answer.

My german is rusty but I understand they're just hiding the sensor in a plastic pipe. That's a really shady way of "protecting" the sensor. Bugs would have the time of their life in these pipes. Also, it doesn't look professional at all.

@Nca78 The lower accuracy is remarkable as they are a lot more expensive. The original model is priced at €14 on TME, while the compact is €58 on Mouser :open_mouth:

I don't understand why Honeywell doesn't provide a simple policarbonate case for these models...

Another famous sensor of this kind is the SPS30 by Sensirion. That one is even more compact, but again there's no standard enclosures on te market...

[secantscope]

@Nca78 said in Enclosure for Honeywell HPM-series PM sensor:

For enclosure, another option is a radiation shield.

What do you mean by "radiation shield"?

[Nca78]

@secantscope said in Enclosure for Honeywell HPM-series PM sensor:

@Nca78 said in Enclosure for Honeywell HPM-series PM sensor:

For enclosure, another option is a radiation shield.

What do you mean by "radiation shield"?

Try Google ;)