RE: [Vo]:Thermal cameras better than thermocouples for averaging temperature

Hard to look at with the naked eye? I don't recall anything in the lugano report about the ecat being hard to look at. I am not sure this is correct. An examination of black body radiative power versus temperature shows that below 3000 degrees kelvin the emission from a hot body is diffuse

Re: [Vo]:Thermal cameras better than thermocouples for averaging temperature

I dunno, have you ever been around glass blowing? It gets pretty bright For example: https://www.youtube.com/watch?v=O1xb48Y6EdA I think these are temperatures around 1320c http://en.wikipedia.org/wiki/Glassblowing On Wed, Dec 10, 2014 at 10:01 AM, Finlay MacNab finlaymac...@hotmail.com

Re: [Vo]:Thermal cameras better than thermocouples for averaging temperature

Brightness depends on how much light is in the visible range. What is happening is that as the device gets hotter, a greater percentage of the light falls in the visible range, AND, a greater total amount of radiative energy is being emitted. Both are going on at the same time. It gets bright

Re: [Vo]:Thermal cameras better than thermocouples for averaging temperature

http://blog.phillips-safety.com/glassblowing-lenses/ How about UV radiation? On Wed, Dec 10, 2014 at 11:15 AM, Bob Higgins rj.bob.higg...@gmail.com wrote: Brightness depends on how much light is in the visible range. What is happening is that as the device gets hotter, a greater percentage

Re: [Vo]:Thermal cameras better than thermocouples for averaging temperature

finlaymac...@hotmail.com To: vortex-l vortex-l@eskimo.com Sent: Wed, Dec 10, 2014 1:07 pm Subject: RE: [Vo]:Thermal cameras better than thermocouples for averaging temperature Hard to look at with the naked eye? I don't recall anything in the lugano report about the ecat being hard to look

RE: [Vo]:Thermal cameras better than thermocouples for averaging temperature

I dunno, have you ever been around glass blowing? It gets pretty bright I think this is a question of surface area. Based on this calculator http://www.spectralcalc.com/blackbody_calculator/blackbody.php , and my limited understanding of radiance, a 1400C (~1700K) black body radiator will

RE: [Vo]:Thermal cameras better than thermocouples for averaging temperature

And I forgot, much of the brightness of glass is from the sodium emission line. Glassblowing glasses filter the sodium emission line (brilliant yellow light). Much of the brightness of molten glass comes from light from sodium if i recall correctly. In fact, when you put on sodium line