Please note that the exact Dielectric Constant Values are not available with us / PERSTORP.

Under such circumstances you can give our trial sample to Instrument vendor to check the instrument requirement, also refer to our mail on dielectric constant data & condition requirement based on theoretical data available with us. 

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LTL's mail to TF dated 05/09/2007

Please note that we are separating two layers in Extraction one is aqueous layer with 50-60% water & Organic layer with 75-85% Isobutanol.

The isobutanol dielectric figure is more than 1.6 as per requirement & the difference between dielectric figures of two layers shall be higher than 10 as per requirement as bottom layer is almost water.

Kindly check for other requirements to use the instrument & go ahead for further engineering.

Also inform us & keep a note to have this instrument flameproof & as per our requirement of ATEX regulations.

Please revert back for any information or clarification required.

Unquote
Please refer to the Dielectric Constant Data for some of the pure components of our required components as follows,

Isobutanol (@ -112 Deg F) - 31.7, Isobutanol (@ 32 Deg F) - 20.5, Isobutanol (@ 68 Deg F) - 18.7

Therefore @ 176 Deg F it could be approx. 13.3.

Water (@ 32 Deg F) - 88.0, Water (@ 68 Deg F) - 80.4, Water (@ 212 Deg F) - 55.3

Therefore @ 176 Deg F it could be approx. 61.

Please also note that we are able to find out the constants for Penta, Sodium Formate in literature. As organic phase is with most of the Isobutanol (approx. 75-80 %) & water (approx. 10-12 %) and Salt phase will be aqueous & water content will be approx. 50-60 % water, we may consider dielectric constant values as 15-20 for organic phase & 50-60 for salt phase. Accordingly you can consult the instrument vendor & decide based on their experience.

If not possible to solve the issue as per above note, we suggest you to choose another type as per your experience & knowledge but it shall be suitable for our required Hazardous area classification & capability to communicate to DCS (4-20 mA).

Kindly confirm your course of action.
