Hello Everyone,
I just bought the AirGradient One Kit and assembled it. My PM sensor show PM2.5 values between 5 and 15 ug/min3 most of the time. Its production date is 20250530. I don’t see the behaviour described here where the sensor mostly shows 0 ug/min3. Should I perform batch correction anyway for better results? I’m asking since I noticed there is a calibration formula in the admin panel for this batch., but i am not sure if I should perform the calibration with this formula.
Hi @DidoEng , welcome to our community!
It’s a good practice to apply a custom calibration formula where possible, alongside the EPA formula in most cases.
In your case, if you are using the AirGradient Dashboard only, please kindly pick 20250530.
However [you can ignore the message after this if you are only using AirGradient Dashboard with your monitor], in case you’re not only using the AirGradient Dashboard (e.g. you also use Home Assistant). Currently, I recommend you pick the Custom via PM count in the PM2.5 calibration section instead of picking 20250530 directly, then input the scaling factor and offset accordingly (scaling factor: 0.02411, offset: 0). Since we found that some of the batch-specific calibration formulas are not applied locally on the device (we are working on a fix and will roll out on the next firmware releases). These are the calibration formulas that have the issue the the configuration are not applied on the local device (but it does work normally if you’re relying on using only AirGradient Dashboard):
- Custom via PM2.5 Raw
- PMS5003T_20241222
- PMS5003T_20250208
- PMS5003_20250530
Hello Tai,
thank you for your answer!
So if I understood you correctly, if I am using the AirGradient Dashboard, I need to go to the admin panel, then edit the pm2.5 calibration and after that I should choose EPA formula click next and so on… and then redo this again with the PMS5003_20250530 formula, right?
Hi @DidoEng, you’re welcome! You can simply select the PMS5003_20250530 and check the ‘Apply EPA Formula’ box (this box will appear as soon as you select the PMS5003_20250530) as shown in the image below.
