Visualizing Flow Using IR Transparent Fluids

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The discussion centers on finding fluids that are transparent to thermal infrared (IR) light for visualization purposes. Water is opaque to IR, limiting observation to surface phenomena, prompting the search for alternatives. Participants mention working with fluids like acetone and dichloromethane, which only offer limited transparency. There is a specific interest in identifying room temperature IR transparent fluids that can provide better visibility, with carbon tetrachloride noted as having no IR spectrum. The conversation seeks recommendations or references to research on suitable fluids.
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Hi.
I am working on visualization of flow with thermal infrared camera. As it is known, water is not transparent for IR spectrum of light, so you can`t watch phenomena that are occurring "inside". You can only see things that are occurring on the interface of water and wall.

I have been working with some fluids like acetone or dichloromethane, which are transparent only few millimeters.
Now I am trying to find liquids that are transparent more than that, let`s say few cm.
So, has anybody been working with such a fluid or does anybody know for a research/article, which has dealed with this things?

Thx.
 
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Hi,

I am also looking for room temperature IR transparent fluids. Were you able to narrow down any fluids with such property ? Please suggest.

Thank you !
 
Carbon tetrachloride has no IR spectrum.
 

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