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wieczorekjp
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Join Date: Sep 2013
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Saturation Constants for 3M FC-770 Coolant

09/18/2013 4:58 PM

I just purchased a new GE/Panametrics 880 Hygrometer to meaure moisture in the 3M Coolant, FC-770. The humidity probe requires a table of Temperature vs. Saturation Constants. No one at the vendor can explain to me what the Saturation Constants represent, what their units are, and what information I need to ask 3M to provide. To meet my moisture spec, the moisture must be less than or equal to 5 ppmw in the FC-770 Coolant.
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Pathfinder Tags: FC-770 hygrometer Saturation Constants
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lyn
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#1

Re: Saturation Constants for 3M FC-770 Coolant

09/18/2013 5:18 PM

Fluorochemicals in Heat Transfer Applications

Thermal Management Fluids

Fluorinert Electronic Liquid :3M US
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welderman
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Re: Saturation Constants for 3M FC-770 Coolant

09/19/2013 9:08 AM

I'm afraid that the answer to that question is above my pay grade. I would contact a Panametric/GE application engineer and request an explanation. I'm not convinced that the aluminum oxide sensor is appropriate for your application.
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James Stewart
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Re: Saturation Constants for 3M FC-770 Coolant

09/19/2013 9:37 AM

Normally, when measuring the water (moisture) content of any liquid other than water, one carries out what is known as a Karl Fischer titration. Look it up, save the rest of us the pain. Hydrometers are typically utilized to find the relative humidity of air. This rhymes with misapplication of technology to me.

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