I want to measure the depth of a burning soil using IR proximity sensor. The sensor will be placed 20cm above the surface of the soil and measures it perpendicularly.
Problem #1: I'm quite concerned about the environment that the sensor is in, it would be hot (up to 60 degree Celsius) and dusty (as soil burning produces particulate (PM2.5). Will this two condition affect my measurement?
Problem #2 I was thinking that the temperature will, as any measurement device will have thermal drift, but the amount of thermal drift depends on the device itself, how sensitive it is to ambient temperature. Some source says that it changes the wavelength and thus makes the measurement inaccurate.
On the other hand, from some sources the smoke of the soil burning does not affect it too much because the IR wavelength is long enough to go past through the smoke..
Is this correct? If not please correct me and provide some reference
It will also be very useful for me if how much it affects the measurement is provided. Any ideas? I have no prior knowledge on this, so pardon if there's some mistakes.