Relative Permittivity of Water

[exnihiloest]

The text books refer to "pure" water which is irrelevant in the real world where there is no ultra pure highly filtered deionised water in nature.
...

"Pure" water is not irrelevant in the real word. Scientists know how to purify water, and use it.
See:
http://en.wikipedia.org/wiki/Purified_water

[Torana]

Nature doesnt produce pure water is what I meant .
As a commercial product it could be produced on a grand scale but it still hasnt got Natures stamp on it.   
PURE water is clearly a processed product .

Again the relative permittivity scale should note that natural water has NO dielectric qualitiy at all.

[fritznien]

Nature doesnt produce pure water is what I meant .
As a commercial product it could be produced on a grand scale but it still hasnt got Natures stamp on it.   
PURE water is clearly a processed product .

Again the relative permittivity scale should note that natural water has NO dielectric qualitiy at all.

who said ordinary water has no dielectric quality?
its the same stuff just with mobile charge carriers.
put a capacitance meter on an air cap and then flood it, c should go up 80 times.
please note water has a non linear respone to voltage so at low voltage tap water should work well enough.
as for natural just what tech has natures stamp on it?
more important what are you trying to do? you know lots about the subject so just what are you looking for?
fritznien

[Torana]

Ordinary water is clearly not listed on the scale .
A capacitance meter should go up 80 times compared to using air as the initial dielectric but it doesnt ,it goes everywhere,no matter how many times its tested.
In fact using air is the closest it ever gets to being a relable functional cap.
There are thousands of people trying to use water in a capacitor based on what Stan Meyers said but there is no example of ordinary water as a dielectric .
If there were then thered be a place for ordinary water on the scale . There isnt even a repeatable experiment to confirm pure water at 80.

[Torana]

I missed a bit there,  Nature is the bench mark for all technology ,we specialise in below unity and consumption, thats where the money is.
Obviously there is a segment of society who seek more , thats why theyre here .