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Topic: Reading Heat by an infrared photodiode (Read 137 times) previous topic - next topic

Tech-Guy

I would like to measure the temperature of my kiln (already controlled via arduino) by using non-contact methods. I would also like to measure it utilizing things I have on hand.

These two criteria lead me into wanting to use an infrared photo-diode to sense heat in my chamber and calculate the temperature from that.
I know that I will get a weird response curve from it and its highly dependent many things including the type of diode I have sensing this, but I feel its still feasible.

Has anyone had tangible results from this method before?

thanks

MarkT

What temperature range?  You would get more response perhaps from a far-IR sensor in the 4um wavelength
regime - black body radiation isn't very instrinsically bright till you get to yellow/white hot.  Sunlight
and artificial lighting might dominate/confound the reading till then.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

Tech-Guy

What temperature range?  You would get more response perhaps from a far-IR sensor in the 4um wavelength
regime - black body radiation isn't very instrinsically bright till you get to yellow/white hot.  Sunlight
and artificial lighting might dominate/confound the reading till then.
Ah yes, very true!
It can go from room temp to hopefully 1000 Degrees C. I have yet to do real testing with it.. :(

This will be looking into a 'sealed' container for most of the process, and I plan to get some stainless steel to a nice and dull red hot at the very least, hopefully past that orange red temperature as well. then this top end is the range I am more interested in keeping a stable temperature on.

tigger

I may be wrong, but I think Omron did an Arduino friendly infrared thermal sensor at reasonable cost.
Most common IR photodiodes have peak responses in the 800 to 940 nm range.
Do you really need non-contact? Thermocouple might be a lot easier

markusaushalle

have a look here: https://www.melexis.com/en/products/sense/temperature-sensors

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