How can we improve sensor accuracy for community air quality projects in areas with high humidity?

FAQ
1

Hi everyone,

I’ve been running a few community air quality sensors (based on SDS011 and DHT22) in a coastal region with high humidity, and I’m noticing some inconsistencies in the PM2.5 and PM10 readings especially during early mornings and after rain. I’m curious how others are tackling similar issues.

Are there known corrections or filters that help in high-humidity zones? Would adding a heating element or enclosure help reduce false high readings? Any thoughts on integrating additional sensors for better calibration or compensation?

I’m still new to the sensor hardware game, so I’d love to learn from your experience!

Here are a few references I’ve been exploring:

https://www.theengineeringprojects.com/2023/09/introduction-to-sds011-air-quality-sensor.html
https://aqicn.org/sensor/sds011/

2

Can you tell me a bit more about the inconsistencies ?
The Next PM from TERA contains an heater. It can be precisely control and monitored in the last firware according to TERA’s Marketing department.