I don't know the answer to that specific question, but I do know it's an NDIR sensor. The Wikipedia page on that sensor type likely answers your question— http

I don't know the answer to that specific question, but I do know it's an NDIR sensor. The Wikipedia page on that sensor type likely answers your question— https://en.wikipedia.org/wiki/Nondispersive_infrared_sensor https://en.wikipedia.org/wiki/Nondispersive_infrared_sensor