Get obscuration level from output registers ADPD188BI

Hi Devs,

From similar questions https://ez.analog.com/optical_sensing/f/q-a/109688/adpd188bi-calculating-smoke-density

I would like to know if there is any documentation to get a relation from the output registers IR/LED or Ratio between LED/IR to get the % obscuration or PTR similar to the application Note https://www.analog.com/media/en/technical-documentation/application-notes/AN-1567.pdf where "The smoke response for the blue and IR channels of the ADPD188BI is expressed by the power transfer ratio (PTR) in units of nW of optical power returned to the photodiode per mW of optical power emitted by the LED"

I am testing the sensor using a smoke aerosol and the values of the registers jump in the presence of smoke, but how can I measure it or get values in density smoke or obscuration?

Regards,

Arepa



note from application note
[edited by: Arepa at 4:15 PM (GMT 0) on 22 Jul 2019]