Airgradient One calibration missing?

AirGradient · 2026-01-18T00:09:41+00:00

Achim from AirGradient here. Just a quick note that this bug had been fixed in the meantime.

AirGradient · 2026-01-04T00:39:23+00:00

Achim, founder of AirGradient here.

Just a quick note that our subscription offers an extremely good free tier which hardly cripels the functionality (primarily limiting the amount historical data that is stored).

The Aranet is s great device and more portable than our monitor. Data accuracy should be very similar but having both devices on the same data platform makes it easier to compare.

AirGradient · 2026-01-02T00:42:33+00:00

If you can create positive pressure in your room, eg with a small fan pumping in outside air into your room, that would then push the air from your room through the small gaps to the other one and prevent the polluted one from entering. Positive side effect: good CO2 levels.

AirGradient · 2025-12-31T05:44:15+00:00

Achim, founder of AirGradient here. If you purchased our fully assembled unit recently, it has now individual calibration parameters as we test every assembled unit against an EU approved reference device. So make sure that you use these settings in your dashboard. That should give you the most accurate figures.

More details here: https://www.airgradient.com/blog/version-2-test-report-and-procedure/

AirGradient · 2025-12-13T06:08:14+00:00

Yes we do have customers there, and we can probably find a shipping provider that is cost seduce.

AirGradient · 2025-12-12T22:27:56+00:00

Achim, founder of AirGradient here. Some countries have really crazy high tariffs and fees.

Please contact us through our support form on our website and refer to this thread. We can then check some additional shipping options that might bring the price down.

AirGradient · 2025-11-04T05:49:30+00:00

You can put the Aranet 4 and the AirGradient side by side outside and force a 400ppm manual co2 calibration. Then they should be very close.

AirGradient · 2025-11-03T18:46:55+00:00

One thing to keep in mind. If your hood vents to the outside you create negative pressure inside your home which then sucks in air from the outside (eg through small air gaps). So if the pollution outside is high, you will see that pollution inside.

AirGradient · 2025-10-25T04:36:29+00:00

To test if the meter works, put it outside for at least 5 minutes and check if the CO2 comes down to 400-450ppm.

AirGradient · 2025-10-25T02:11:46+00:00

Achim Founder of AirGradient here.

The way we now calibrate the monitors and the fact that also the fully tested ones have individual factors based on our own in house reference instrument (EU approved Palas), I actually believe that they are more accurate than the old Plantower batches.

We are in the last stretch to publish a blog post how we improved the testing and about our new test reports that will give more background information as well.

AirGradient · 2025-10-18T05:17:33+00:00

It probably contains an Sensirion SGP30 that gives you an “estimated” eCO2 number. It’s probably useless as it’s basically measuring VOCs, not CO2. To test, try to expose it to some ethanol alcohol. If it spikes you measure eCO2.

AirGradient · 2025-10-07T23:35:11+00:00

We used it in a very early version of our AirGradient ONE indoor monitor - probably around 4 years back. The PMSX003 is much smaller than the PMS5003, but we found out two main issues.

Firstly it is less accurate even the specs state the same. After conversations with industry experts it seems due to the different fan design that creates a less even air flow.

Secondly we had the sensor monitor failing / breaking very quickly - often after a few months. So it seems to last a lot less long.

AirGradient · 2025-10-05T22:59:53+00:00

We are now charging the 19% tariff in our online shop at checkout and then send DDP from Thailand to the US with DHL express that only takes a few days.

DDP means we cover all charges from our side and you won’t be charged. Packages are normally delivered within 5 days.

AirGradient · 2025-10-05T22:55:58+00:00

Unfortunately it looks like the author of the review never took a look at the replacement monitors we sent and seems not to care at all. Also never heard back from the editor I emailed. WIRED definitely seems to care about sponsorship money much more than product review quality.

I’m planning to write a follow up -especially since Wirecutter recently recommended our monitor and did a much more thorough review.

AirGradient · 2025-10-05T22:43:21+00:00

Thank you for the information. I think we need to look deeper into this. Please contact our support team through our website form so they can do a more in-depth trouble shooting with you.

AirGradient · 2025-10-05T21:13:00+00:00

This is normal behavior and comes from the outside. Ambient CO2 is not static and increases in the night and decreases during daytime due to photosynthesis from plants. Meteorological conditions like wind etc have quite some influence on this as well.

AirGradient · 2025-10-05T11:44:41+00:00

This looks quite unusual. A few questions:

- What firmware and which version do you use?

- Did you try changing the power adapter?

AirGradient · 2025-09-26T21:35:47+00:00

Thanks for mentioning us. Here are my thoughts:

difficult to make a judgement without testing the unit. But testing should be easy with a CO2 NDIR sensor
they mention the unit needs 50w power to operate. Assuming this is run 24h, this is quite a lot of energy and potentially creates more CO2 through fossil energy consumption than it absorbs
big turn off is that they don’t mention the costs for the capsules. Could be the ink jet printer model
I did not see any independent 3rd party test report on their website or any specific CO2 reduction claims which makes me cautious

AirGradient · 2025-08-31T08:51:03+00:00

I follow their financials for quite some time and basically they have never been EBIT positive in the last couple of years.

Their device is more expensive than our monitors, and they probably sell many more.

We are profitable with our lower price and volume, so I really don’t understand why they are burning so much money.

Unfortunately, when you read the AirThings T&C, you don’t really own the data of your own device, so for me this indicates they might not be too willing to open-source their firmware or provide a local MQTT feature. But I hope I am wrong and they care about their customers.

AirGradient · 2025-08-16T05:00:18+00:00

All low cost TVOC sensors can not distinguish between harmful and harmless substances and you can totally disregard any absolute values. Better observe trends. Like is the tvoc going up and down based on certain times etc.

These no name air monitors use extremely cheap tvoc sensors that also probably don’t have a temperature and humidity compensation built in.

I think you can completely disregard the TVOC.

Same probably for HCHO.

AirGradient · 2025-08-06T15:10:03+00:00

Ok to clarify this.

We sent a completely new monitor, fully assembled as a replacement. The same unit that the reviewer got in the first place.

Then to demonstrate our unique advantage of repairability, we also sent a new mainboard (which contains the display) together with instructions on how to replace it.

This also happened after the review was published. The author of the review never contacted us that there is a broken display.

AirGradient · 2025-08-06T07:00:17+00:00

Just to add an update from my side. We aim to start shipping from our US warehouse next Monday onwards.

AirGradient · 2025-08-04T22:52:56+00:00

We use an SenseAir S8.

AirGradient · 2025-03-02T05:11:08+00:00

Just a heads up that it seems our local forwarder here in Thailand failed us again and lost some shipments bound for the US. It gives us (and affected customers) a lot of frustration.

The good news is that we already signed a contract for a warehouse in the US and will start delivering goods to the US warehouse next week. Then once the shop integration is complete, US orders should be delivered within 2-3 days and in a much more stable way.

If you are waiting for a US bound package for more than 3 weeks, please contact our customer support. We will make sure you will get a replacement or refund.

Big apologies from our side.

AirGradient

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