AirGradient Forum

New AirGradient One - PM1, PM2.5, PM10 always 0

Components
#1

Hi,
I’ve just assembled my newly arrived AirGradient One, but from the start the PM1, PM2.5 and PM10 readings always show 0. I’ve updated the firmware from version 3.1.4 to 3.1.9, but that yielded no changes.

I’ve put the device in different rooms as well as outdoors, but the values always stay at 0. Finally I’ve brunt some paper and put the smoke close to the AirGradient, but that didn’t change anything. The PM0.3 sensor did show a spike in that scenario, as well as some smaller spikes before that, but the PM1, PM2.5 and PM10 always remain 0. Therefore I believe my PM1, PM2.5 and PM10 sensors are not working at all.

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Please help

#2

I’m not sure where you are located but currently large stretches of Germany and US have extremely good air quality:

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So a 0 could very well be.

However, if you made some smoke, that could indicate a faulty sensor module. Please contact our support team through the website and we can have a look.

#3

I have the same issue on the latest firmware, all PM values are 0. I have an airthings and an ikea near the AirGradient and both read values above 5.

#4

Can you please contact our support through our website including the serial number of your monitor. Thanks.

#5

Sorry to revive this, I just wanted to give an update as we’ve had a few people reach out after reading this post.

If you are experiencing this issue, please read through this article and apply one of the corrections mentioned within: Enhance the Accuracy of the PMS Sensors

If you are still having issues afterwards, please feel free to reach out to our support team!

2 Likes
#6

Is this new article going to be linked in all of the previous articles discussing the same topic, or the earlier ones fully retired so this is the source of truth?

#7

Ideally, it would be good to update all of them. We just had a few customers reach out citing they had the same issue as this thread in particular so I wanted to give an update. However, you’re correct that there are probably quite a few other threads which might need to be updated too. I’ll look into doing this.

1 Like
#8

Ethan -

I’ve noticed this issue as well, where most of the time all the PM counts (except PM0.3) are reading 0 and then will occasionally spike before hitting zero again.

When I tried to follow your instructions, there was no calibration option for my sensor PMS5003-20250116

What should I do here to get more accurate numbers?

#9

Hi @jrgilman,

Thank you for the update. Have you already reached out to me via our support channel? If not, please send an email to support@airgradient.com, and we will help look into this. We’ve also made an internal note to create a correction for that batch. Hopefully, it will be ready soon!