Oh holy shit man.. I just can't get past the idiocy in the 1st line of every post you make.. The ENTIRE INSTRUMENT is tuned to reading ONLY Deep Infra Red wavelengths. The OPTICS is special glass that filters EVERY OTHER wavelength out so that it is not measured...
No...it isn't...you might be able to get past your idiocy if you actually tried to learn a bit about the instrument...It is not "tuned" to only read deep IR wavelengths...and the optics are nothing but a lens that focuses light (IR) onto a thermopile behind it.
Once again, although you apparently are too dense to understand, your IR thermometer is measuring nothing...NOTHING...but the amount and rate of temperature change of an internal thermopile...The lens in the front focuses light (IR) onto the thermopile which then either warms up, or cools down due to absorbing energy from the object you are pointing at, or loses energy to the object you are pointing at...the temperature change is converted to an electrical signal which is measured, put through a formula and converted to a temperature... It has a maximum and minimum range but that is due to the thermopile itself, not the magical glass...or any other hocus pocus you believe to be going on.
The fact that you call me an idiot when you don't even know how this simple instrument works is both funny, and sad...
And back to the point....does an instrument that measures the rate of change of an internal thermopile and converts it to a temperature tell you anything about discrete wavelengths of energy?
Do you know what the word discrete might mean with regard to wavelengths of energy? Discreet, from the latin discretus....separate...distinct.
You are the source of the idiocy here...not me...you and your belief in magic...
Damn this is pretty dense denial.. You've totally lost the ability to think clearly.... Don't even CARE to reinspect these brain farts after being corrected a dozen times.. For the FINAL time...
Yep....you are chin deep in denial...so far in that you don't even realize it...you have gone off the deep end and surrendered to magical thinking...and no matter how many times you repeat your total misunderstanding...you will still be wrong.
The INSTRUMENT is not losing heat to the snow pile.. HERE"S WHY...
Of course it is...
1) The optics is a highly magnified field of view.. The inclusion angle is about 12Deg and is "cut off" for operation at about distances longer than 10 feet.. Which MEANS the actual AMOUNT of snow pile being viewed at say 4 feet is about a 3 inch diameter of snow... So if you think 3" of snow in the FOView -- demagnified onto about a 10mm sensor at four feet away is gonna COOL the sensor MORE than the AMBIENT BELOW FREEZING temperature -- your brain is in idle...
That is precisely why the light from the object is "FOCUSED" onto the thermopile...
2) You can make that measurement at 1 foot to 10 feet and get the SAME RESULT... If the snow pile was COOLING the sensor -- there would LESS cooling the farther away you went...
Read the info on your thermometer..it states pretty clearly that the further away you are from the object, the less accurate the reading will be...because the light from the object is FOCUSED" on the thermopile...
3) How does the snow pile "cool" the sensor anyways??
Refer to Pictet's experiment...he was operating under the mistaken belief that cold objects emitted cold radiation as well...and his experiment describes a rudimentary IR thermometer...
http://tech-know-group.com/papers/Pictet-Apparent_Radiation_and_Reflection_of_Cold.pdf
Pictet unintentionally provided a fine demonstration of the fact that a cold body can not make a warm body warmer...and some 50 years later Lord Kelvin and Clausius provided second law of thermodynamics and its one way energy movement to explain what was happening in Pictet's experiment... Your IR thermometer works just like that only considerably more complicated and accurate...
The air is not a great thermal conductor.. And in fact, if anything was cooling the sensor it would be the ambient air -- not the snow pile..
Again...the snow pile is FOCUSED on the internal thermopile...it is the thermopile, and its amount and rate of cooling or warming that is converted to an electrical signal, run through a formula and then provides a temperature.. The only thing being measured is how much and how quickly the thermopile is warming or cooling...it isn't a difficult concept to grasp if you could drop the belief in magic just for a minute...
There is NO DIRECT HEAT TRANSFER path from the sensor to the snow pile with any amount of real efficient CONDUCTIVE heat transfer... It's all a machine gun battle of photons..
Sorry guy...your IR thermometer is not magic...it is a simple machine that measures how much and how fast an internal thermopile is warming or cooling...nothing more...if you point it at a cool object, then it loses heat to the cooler object...
Here....from
The Handbook of Modern Sensors: Physics, Designs, and Applications: page 307, section 7.8
If the object is warmer than the sensor, the flux (phi), is positive. If the object is cooler, the flux becomes negative, meaning it changes its direction: the heat goes from the sensor to the object. This may happen when a person walks into a warm room from the cold outside. Surface of her clothing will be cooler than the sensor and thus the flux becomes negative. In the following discussion, we will consider that the object is warmer than the sensor and the flux is positive
Now you can go on with your magical thinking all you like...but the fact is that the thermopile in your IR thermometer is losing energy to the cooler object...you are not measuring magical cold radiation coming from a snow pile or any damned thing else that is cooler than your thermometer...
You're on your own with the rest of that post.. I'm in shock and awe....
Convenient dodge...It is apparent why you wanted to make a "safe zone" of the entire board except for this thread which you gave a derogatory name...you have made an abysmal showing here and you should be embarrassed for yourself... Dogma and magical thinking is not a good substitute for actually knowing a thing or two...
You may have a career in instrumentation, but it is clear that you don't know what they are measuring or how they are doing it...you are immersed in the dogma to the point that you aren't even able to get a clue...because like all consumers of dogma...you believe you already have all the answers....
