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fill fluid selection

fill fluid selection

fill fluid selection

(OP)
I must buy the right fill fluid for two similar DPcells;

these fluids have contact with process fluid:
the first with sulfuric acid aqueous solution pH 2
and the second with soda aqueous solution pH 13.

I think that fluids must have some Characteristics:
density > process solution
immiscible with process solution
no reactivity with process solution
operative temperature 0-40°C
low volatility

What do you propose?
Thanks  

RE: fill fluid selection

Fluorocarbon liquid.  3M product.  Not cheap, but will definitely work.

Or diaphragm seals...

RE: fill fluid selection

Are you talking about a U-tube manometer? I can't think of anything else that would not use diaphragms.  

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