chokey:
Is there anyone in this room that can show me some example on how to interface IR distance sensor with flame sensor. I'm a newbie. tq
IR distance sensors usually work by reflection. I think you will have a hard time getting an IR signal to reflect off a flame, and an even harder time telling the difference between the reflected signal and the heat of the flame. In other words, it seems to me that the approach you're taking is a complete non-starter.