SDS011Incorrect readings

Hi,

After a period of being disconnected I activated my sensor again. But found incorrect readings:
PM10: 1999.90
PM2.5: 999.90
Is my sensor defective/end of life?

Welcome !
It could be a bit shifting in the serial.

Please check the connections and put a bit of contact fluid to remove oxidation.

Hi, sorry for the late answer. ll connections are soldered, so the connections should be ok.