high reflection surface pyrometer measurement

[homoly]

Hello,

I would like to know if I could get somewhere some kind of stickers, which I could use as an alternative to spray color with defined emissivity to measure copper and aluminum surface temperatures with pyrometer.

 

[eyec]

plain old black electrical tape has an emissivity of 99

not the vinyl stuff

Steven C
Senior Member
ThirdPartyInspections.com

 

[homoly]

Thank you for the tip. Just to make it sure, you mean impregnated cloth tape ?

 

[eyec]

yes


Steven C
Senior Member
ThirdPartyInspections.com

 

[homoly]

Thanks. Just FYI I have found that the PVC tape should have emissivity of 0.95.

Gabriel.

 

[eyec]

true, but it seems to not last as long

Steven C
Senior Member
ThirdPartyInspections.com

 

[electricpete]

There are some paints marketed for their high emissivity characterisitcs such as:

http://www.aboutmtc.com/assets/DURACON/DURACON4_MTC.pdf

I think almost any paint with a matte (vs glossy) finish has high emissivity. At your hardware store you should be able to find Krylon flat black spray paint that has an emissivity of around 0.95. You can of course check the emissivity for yourself without too much trouble.

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[homoly]

Thanks,

Meanwhile I have found the supplier in Czech republic. The following link is in Czech but i attach it just to have and idea about special color and stickers with the defined emissivity and able to withstand high temperatures:

http://www.tmvss.cz/images/Clanky/NOVINKY/thermaspray-spot.pdf