A Waveshare Dust Sensor Detector Module with Sharp GP2Y1010AU0F.
Accuracy is relative. The dust sensor is in my bedroom, when I cook toast in the AM the dust sensor will register a change of particulate. The sensor takes a moment or 2 before the sensor reading changes.
I'm sure you could put the sensor into the smoker, let smoke run through its sequence, record the smoke at its various levels of a dying fire, and then go from there. Really neat project.
Thinking about it you might want to channel the smoke into the sensor. I mounted my sensor on top of the box with a small box fan mounted on top to push the air around.