Closed szerwi closed 3 years ago
I have found out that in the newest version of the library it is possible to get both parameters from the sensor by defining tsi_mode to true or false in read(bool tsi_mode, bool truncated_num)
function.
https://github.com/avaldebe/PMserial/blob/master/src/PMserial.cpp#L201-L206
So the remaining question is: What are the differences between standard and ATM and which one is better to use in monitoring air pollution in outside environment?
As far as I understand the CF=1
variables are "raw" estimates from the particle counts, assuming a fix particle radius and composition (likely used for used for factory calibration and quality control). The ATM
variables (default) are compensated for "real" particles.
Thank you for the information. I have tested ATM values in comparison to CF=1 values and it seems that in low pollution conditions values are the same, but the higher pollution gets, the bigger the difference is. In high pollution environment, ATM values are lower than CF=1 values.
I have observed
it seems that in low pollution conditions values are the same, but the higher pollution gets, the bigger the difference is. In high pollution environment, ATM values are lower than CF=1 values.
Yes, I have observed the same behavior.
It looks like I managed to answer your question, so I'll close this issue. Please re-open it if my answer was lacking.
Hi,
In PMS5003 datasheet I've found that the sensor is returning 2 different PM values. There is a value described as
CF=1,standard particle
and a value described asunder atmospheric environment
. Do you know what is the difference between, for example PM10 standard and PM10 under atmospheric environment? Which value is being read by this library? Is there a possibility to read the other value using this library?