All remote seal applications in my plant was for level measurements. is it accurate to use this (with threaded option) to measure flow (of a solution that always cause blockages in the samples)? this flow is measured through DP measurement (Orifice). so my question is about response time in this measuring technique, as i'm willing to use a capillary oil-filled with length up-to 7 meters. what do you think guys?

 

Rosemount's remote seal guide, 00809-0100-4002, has a table comparing response times for balanced (equal length capillaries) with a tuned system (intended for level, direct mount xmtr on lower tap, single capillary to upper tap).

The table is here:
http://s21.postimg.org/bk1vfwjhj/system_response_time_2c.jpg

The larger diameter capillary slows response considerably.
Tuned system would not apply to your situation.

Smar has a 11 pages with graphs and calcs for determining response time in their remote seal installation guide,

SR301ME, (starts on page 16, pdf)

http://www.smar.com/PDFs/Manuals/SR301ME.PDF

I have seen Taylor wedge or V-cone style primary flow elements machined to accept diaphragm seals, so it is doable.

 

Correction:
> The larger diameter capillary slows response considerably.

Should be:

The smaller diameter capillary slows response considerably.

I need an editor looking over my shoulder.

 

Thanks David
i'll take a look on these docs