Transmittance of Cyclohexane for IR Radiation Through Quartz Viewport

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The discussion centers on the use of a pyrometer to measure the temperature of a graphite heater operating at up to 1200°C within a chamber filled with liquid cyclohexane, viewed through a quartz viewport. Key concerns include whether cyclohexane will allow infrared (IR) radiation in the 2-4 micron wavelength range to pass through the quartz to the pyrometer. Participants suggest researching the IR transmission properties of cyclohexane and its overlap with the pyrometer's sensitivity range. There is an emphasis on the importance of ensuring the chamber is pressure-proof due to cyclohexane's boiling point of around 80°C, and the discussion includes a mention of a separate condenser for vapor management. Efforts to find relevant IR spectra for cyclohexane in the specified range have been unsuccessful, with participants sharing resources and acknowledging the difficulty in locating data that covers the necessary wavelengths.
Jhon Paul
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I am interested to use a pyrometer to measure the temperature of a graphite heater while it is being heated (upto 1200 degC). The heater is located inside a small chamber filled with liquid cyclohexane . For viewing purpose of the pyrometer the chamber is having a viewport of Quartz.

The pyrometer can sense wavelength in the range 2 - 4 micron. I am interested to know whether cyclohexane will transmit the IR radiation to pass through the quartz viewport upto the pyrometer. Will appreciate a reply in this regard.
 
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Jhon Paul said:
(upto 1200 degC). The heater is located inside a small chamber filled with liquid cyclohexane

Can't help with IR (I would start finding the expected wavelength and comparing it with the IR spectra for cyclohexane, no idea if the ranges will overlap though) but I hope your chamber is pressure proof, cyclohexane boils around 80°C.
 
Thanks for your reply. The vessel is not closed and the vapours once formed will be condensed using a separate condenser. In fact I was trying to find IR curve for cyclohexane in the range of 30000 to 60000 cm-1 wave number. Unfortunately i could not get one . If you find any IR curve in that range please do communicate.
 
Finding the IR spectra is not that difficult. Problem is, I don't think these cover the IR range OP mentioned, so they are useless here.
 
I agree with you. The IR curve I have obtained none of them spells anything in that region of 2-4 microns.
 
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