Strain Gauge Pressure Transducer to Give Force

Question

Strain Gauge Pressure Transducer to Give Force

Jericho93 (Mechanical)

(OP)

11 Aug 17 08:55

Hello,

I am having a little trouble getting some clear information with regards to the importance of pressure sensor surface area.

Say I am using a pressure sensor with a 30mm flush diaphragm, mounted so that its sensing head is flush with the inner diameter of a pipe, used to move a non homogenous fluid.
Imagine it gives me a reading of 30 Bar - firstly, could I safely assume that the pressure around the whole inner diameter of the pipe (in line with the pressure sensor) is 30 bar?

Also - if I wanted to translate this to a force, what area should I consider, the inner circumference of the pipe and the diameter of the sensor? Or just the area of the sensor?

I don't feel like i've explain myself clearly - but if anyone could have a go at a reply and maybe we can go from there.

Thanks.

Jericho.

IRstuff (Aerospace) · Answer 1 · 2017-08-11 15:27:52

> Probably no, particularly since you say it's a "non-homogenous fluid."

> re: force, it depends on what you are trying to do with the calculated force.

TTFN (ta ta for now)
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roydm (Industrial) · Answer 2 · 2017-09-06 00:11:51

Pressure is pressure, it makes no difference how large the surface is.
It might be easier to think in a unit like psi which is descriptive (pounds per square inch)

If you have a 1" diaphragm or a 3" diaphragm the transmitter sees the same pressure 30 bar

Sorry I haven't explained it very well either

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Strain Gauge Pressure Transducer to Give Force