Thermal transparent material

[danils]

Dear all,

I have to make some small test enclosures to test device temperature into their ultimate enclosure.
In order to do this I have to make the top part of this test enclosure with a thermally transparent material to point the thermal camera above.

Can you suggest which material (easily available and not too much expensive) I can use?

Many thanks

Daniele

[markb1980]

There are thermal inspection windows which are made for that purpose: https://www.flir.eu/products/ir-windows/

[wraper]

You can put a thin polyethylene bag/film over a frame.

[RO]

Mike did it
https://youtu.be/3RHR_HSQhxg

[Fraser]

FLIR disposable lens protectors use polyolefin film. I recommend 12 micron or 15 micron thickness. It is easily bought as food and product shrink wrap ! Not expensive and applying some heat will shrink it so when in a frame it pulls tight.

Be aware that if you create a ‘top cover’ made wholly of polyolefin film, heat will radiate through it easily, unlike if a solid, thermally opaque or reflective, top cover were fitted. This could effect the validity of your measurements. A small window in a solid cover that exposes an area of interest may be a better idea.

The film will introduce a small measurement error due to its less than perfect transmission characteristics, but you can experiment with it to adjust your temperature measurements. Some cameras even have the menu option to input a thermal windows transmission figure for automatic correction to measurements.

Fraser