JDTaylor

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Nicely done, good info!
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asriggs1987

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Probably need to factor in how long the cars have been sitting in the sun to make it a fair comparison.
 

Cyberman

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There’s been some discussion over the years about how hot the CT would be, both inside and out. Well the Merritt Isle. SC has another customer CT in the parking lot and I noticed that the sun’s reflection from the CT felt quite hot on my face. I then hesitantly put my hand on the hood and it was damn hot. I did the same to the black S parked next to it and it actually seemed hotter. But I knew that wouldn’t be good enough for this group so I went home and returned with my IR temp sensor and shot the temp of the panel perpendicular to the sun and replicated the same angle as best I could with black, MSM, and white Teslas parked nearby. Here are the results in degrees F:

CT = 106
Black = 144
MSM = 140
White = 107


IMG_9134.jpeg


IMG_9136.jpeg


IMG_9135.jpeg


IMG_9138.jpeg
Thank you for your thourough, and (as far as I'm concerned) scientific test. It's good to know the Cybertruck was the coolest of all!
 

TexasRaider

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There’s been some discussion over the years about how hot the CT would be, both inside and out. Well the Merritt Isle. SC has another customer CT in the parking lot and I noticed that the sun’s reflection from the CT felt quite hot on my face. I then hesitantly put my hand on the hood and it was damn hot. I did the same to the black S parked next to it and it actually seemed hotter. But I knew that wouldn’t be good enough for this group so I went home and returned with my IR temp sensor and shot the temp of the panel perpendicular to the sun and replicated the same angle as best I could with black, MSM, and white Teslas parked nearby. Here are the results in degrees F:

CT = 106
Black = 144
MSM = 140
White = 107


IMG_9134.jpeg


IMG_9136.jpeg


IMG_9135.jpeg


IMG_9138.jpeg
Why isn’t this breaking news? 😝 jk
 


neights

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This is one concern I have about a matte black wrap, some good points made here though. Thanks for the good info, all!
 

toybuilder

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Careful: Thermal spotters, like thermal cameras, will read the wrong temperature on reflective surfaces, especially metal. Thermal signature will be a mix of small amount of emissions from the metal and much more of the sky or other objects nearby.


Tesla Cybertruck Cybertruck stainless steel surface temperature vs. painted — MEASURED DATA 1711793886393-c4

https://pim-resources.coleparmer.com/instruction-manual/20250-05.pdf

In this image of a circuit board, the board is more or less uniformly hot (except for the actual heat source in the center) - but the parts of the boards that are "unpainted" (lack soldermask) look much cooler as it looks more like the ambient room temperature it is reflecting.


Tesla Cybertruck Cybertruck stainless steel surface temperature vs. painted — MEASURED DATA 1711793700097-3x


Often, the metal surface will show cooler than what it actually is. But not always -- If you were to hold a cold piece of metal and then have it reflect a hot source (inside of an oven for example), the metal will show hotter than it actually is.
 

Trekboy

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Careful: Thermal spotters, like thermal cameras, will read the wrong temperature on reflective surfaces, especially metal. Thermal signature will be a mix of small amount of emissions from the metal and much more of the sky or other objects nearby.


1711793886393-c4.png

https://pim-resources.coleparmer.com/instruction-manual/20250-05.pdf

In this image of a circuit board, the board is more or less uniformly hot (except for the actual heat source in the center) - but the parts of the boards that are "unpainted" (lack soldermask) look much cooler as it looks more like the ambient room temperature it is reflecting.


1711793700097-3x.png


Often, the metal surface will show cooler than what it actually is. But not always -- If you were to hold a cold piece of metal and then have it reflect a hot source (inside of an oven for example), the metal will show hotter than it actually is.
Excellent. After watching the video I was thinking about using a small amount of electrical tape on the various surfaces to even them out. To be really accurate, does anyone know what the emissivity of black vinyl electricians tape is?
 

HaulingAss

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Excellent. After watching the video I was thinking about using a small amount of electrical tape on the various surfaces to even them out. To be really accurate, does anyone know what the emissivity of black vinyl electricians tape is?
It would be close to .95 EMS. But the sampling area is bigger than you might expect when using a run-of-the-mill IR thermometer so you will need a larger target to get the accuracy you want. I think masking tape, the wide stuff, put on two wide will give you better results.
 

TickTock

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Here is a selfie I took of my reflection in my brushed SS fridge. You can see how the SS nicely diffuses the visible spectrum but acts like a polished mirror to IR. It is a very good chance any IR thermometer is seeing reflected IR more than what is actually emitted from the material itself.
Tesla Cybertruck Cybertruck stainless steel surface temperature vs. painted — MEASURED DATA fridge_selfie
 


FutureTruck

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Big takeaway here is careful on the equipment you use to measure reflective surfaces, and big surprise........................if you are worried about heat stay away from black.
 

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Big takeaway here is careful on the equipment you use to measure reflective surfaces, and big surprise........................if you are worried about heat stay away from black.
Black is... A double-edged sword. It'll absorb more, but that also means only half that gets through. With paint and films, that's important! You can end up with a much better temperature gradient through the composite with a black opaque layer than a white translucent one.

-Crissa
 

HaulingAss

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Here is a selfie I took of my reflection in my brushed SS fridge. You can see how the SS nicely diffuses the visible spectrum but acts like a polished mirror to IR. It is a very good chance any IR thermometer is seeing reflected IR more than what is actually emitted from the material itself.
fridge_selfie.jpg
Wow! You don't look anything like your profile pic!
 

firsttruck

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Here is a selfie I took of my reflection in my brushed SS fridge. You can see how the SS nicely diffuses the visible spectrum but acts like a polished mirror to IR. It is a very good chance any IR thermometer is seeing reflected IR more than what is actually emitted from the material itself.
fridge_selfie.jpg
Wow! You don't look anything like your profile pic!
Hey, I agree. But I also think I have seen him before too.

Didn't he appear in a TV episode of "The Outer Limits" or "Twilight Zone" or maybe it was some SciFi movie?
 
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It would be close to .95 EMS. But the sampling area is bigger than you might expect when using a run-of-the-mill IR thermometer so you will need a larger target to get the accuracy you want. I think masking tape, the wide stuff, put on two wide will give you better results.
I’d think getting the temperature of tape-covered stainless would have its own measurement accuracy issues. I’m surprised folks aren’t suggesting an array of RTDs glued to the inside surface 🙄.
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