data inconsistency between SEN55 and SDS011.
same balcony, same conditions…
different data…
Hello @metron6 , this is system immanent that there are differences between sensor from different manufacturers. And the time the sensors are running.
System: All optical sensor are counting particles in different classes of size. Then the manufacturer tries to find the right average weight per particle per class. But this may differ by location or time (types of industry, heating in winter, …)
Normally these values don’t differ that much as shown in your screenshot.
How long are these sensor running? We have seen some sensors that show high values the first days, until the “dust” inside the sensor was blown out.
Also is the powersupply within the specs of the manufacturer? Long cables can cause a voltage drop and misreadings.
You can check the supplied voltage at the sensor with a multimeter
i have them both outside… i will wait a week and i will repost the image…
they both use a nodemcu v3, supplied with a 3m cable and 5V.
Sen 55 gets the 5v he needs…