Docs for PR #3220

ACKNOWLEDGEMENTS.md

@@ -899,3 +899,4 @@ Further device support has been made with the assistance of users. Please consid
 - [julianguinard](https://github.com/julianguinard) for contributing support for Feyree portable EV charger.
 - [lemeshovich](https://github.com/lemeshovich) for contributing support for Haozee ZG-302ZM presence dual light switch.
 - [emmanuel-ferdman](https://github.com/emmanuel-ferdman) for contributing logging improvements.
+- [r3m0x](https://github.com/r3m0x) for contributing support for PTH9BW air quality monitor.

DEVICES.md

@@ -994,6 +994,7 @@ port and password.
 - PH-W218 water quality monitor
 - PlantsIO Ivy smart planter
 - Protmex PT-19DW alarm clock with temperature and humidity monitor
+- PTH9BW air quality monitor
 - PV28-CW 8 in 1 air quality monitor
 - RSE TY-WFH v3.01 gate controller
 - RTCZ-03 human presence sensor