circuit for testing conductivity of water

M

Matteo

Guest
hi,

a mate of mine wants to build up a circuit to test the conductivity of
water

in amps or volts etc, i dont have all the details, but i think you know
what i mean

thanks,
matteo
 
Good for him,

Thanks for the information.

However it might be more useful if measured in units of conductivity
(Siemens, milliSiemens or - most likely - microSiemens).

Cheers,
Alf

"Matteo" <matteo-at-ii-dot-net> wrote in message
news:4034b8fd$0$22533$5a62ac22@freenews.iinet.net.au...
hi,

a mate of mine wants to build up a circuit to test the conductivity of
water

in amps or volts etc, i dont have all the details, but i think you know
what i mean

thanks,
matteo
Click to expand...

---
Outgoing mail is certified Virus Free.
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"Unbeliever" <alfkatz@remove.the.bleedin.obvious.ieee.org> wrote in
message news:4034ec96$0$29131$afc38c87@news.optusnet.com.au...
Good for him,

Thanks for the information.

However it might be more useful if measured in units of
conductivity
(Siemens, milliSiemens or - most likely - microSiemens).

Cheers,
Alf
Click to expand...
oh sorry...

i forgot to mention that he is actually looking for a circuit
so thats why i asked

and yes siemens i think he was talking about

so yes if anyone has any useful circuits or places to look, then the
info would be appreciated
 
Heres a suggestion...
Go buy one!!!
HTH
Wayne
"Matteo" <matteo-at-ii-dot-net> wrote in message
news:4034ed66$0$22507$5a62ac22@freenews.iinet.net.au...
"Unbeliever" <alfkatz@remove.the.bleedin.obvious.ieee.org> wrote in
message news:4034ec96$0$29131$afc38c87@news.optusnet.com.au...
Good for him,

Thanks for the information.

However it might be more useful if measured in units of
conductivity
(Siemens, milliSiemens or - most likely - microSiemens).

Cheers,
Alf

oh sorry...

i forgot to mention that he is actually looking for a circuit
so thats why i asked

and yes siemens i think he was talking about

so yes if anyone has any useful circuits or places to look, then the
info would be appreciated
Click to expand...
 
On Fri, 20 Feb 2004 05:52:19 +1100, "#HISH" <gagf2u@home.com> wrote:

Heres a suggestion...
Go buy one!!!
Click to expand...
Not a bad suggestion. Pocket water conductivity meters are around $100. Try
hydroponics shops.

Alternatively remember Google is your friend.

HTH
Wayne
"Matteo" <matteo-at-ii-dot-net> wrote in message
news:4034ed66$0$22507$5a62ac22@freenews.iinet.net.au...

"Unbeliever" <alfkatz@remove.the.bleedin.obvious.ieee.org> wrote in
message news:4034ec96$0$29131$afc38c87@news.optusnet.com.au...
Good for him,

Thanks for the information.

However it might be more useful if measured in units of
conductivity
(Siemens, milliSiemens or - most likely - microSiemens).

Cheers,
Alf

oh sorry...

i forgot to mention that he is actually looking for a circuit
so thats why i asked

and yes siemens i think he was talking about

so yes if anyone has any useful circuits or places to look, then the
info would be appreciated
Click to expand...
 
what about mhos, the reciprocal of ohms? Measure in ohms and take its
reciprocal.

"DJ" <Garbage.davidjudy@optusnet.com.au> wrote in message
news:e3ea30dcb7m8jru20f60gkgni40uq11vai@4ax.com...
On Fri, 20 Feb 2004 05:52:19 +1100, "#HISH" <gagf2u@home.com> wrote:

Heres a suggestion...
Go buy one!!!

Not a bad suggestion. Pocket water conductivity meters are around $100.
Try
hydroponics shops.

Alternatively remember Google is your friend.

HTH
Wayne
"Matteo" <matteo-at-ii-dot-net> wrote in message
news:4034ed66$0$22507$5a62ac22@freenews.iinet.net.au...

"Unbeliever" <alfkatz@remove.the.bleedin.obvious.ieee.org> wrote in
message news:4034ec96$0$29131$afc38c87@news.optusnet.com.au...
Good for him,

Thanks for the information.

However it might be more useful if measured in units of
conductivity
(Siemens, milliSiemens or - most likely - microSiemens).

Cheers,
Alf

oh sorry...

i forgot to mention that he is actually looking for a circuit
so thats why i asked

and yes siemens i think he was talking about

so yes if anyone has any useful circuits or places to look, then the
info would be appreciated
Click to expand...
 
Do a large calculation and you just may qualify for a mho award :)
Wayne
"John" <johnsjunk.nospam@dodo.com.au> wrote in message
news:40356d0e@news.comindico.com.au...
what about mhos, the reciprocal of ohms? Measure in ohms and take its
reciprocal.

"DJ" <Garbage.davidjudy@optusnet.com.au> wrote in message
news:e3ea30dcb7m8jru20f60gkgni40uq11vai@4ax.com...
On Fri, 20 Feb 2004 05:52:19 +1100, "#HISH" <gagf2u@home.com> wrote:

Heres a suggestion...
Go buy one!!!

Not a bad suggestion. Pocket water conductivity meters are around $100.
Try
hydroponics shops.

Alternatively remember Google is your friend.

HTH
Wayne
"Matteo" <matteo-at-ii-dot-net> wrote in message
news:4034ed66$0$22507$5a62ac22@freenews.iinet.net.au...

"Unbeliever" <alfkatz@remove.the.bleedin.obvious.ieee.org> wrote in
message news:4034ec96$0$29131$afc38c87@news.optusnet.com.au...
Good for him,

Thanks for the information.

However it might be more useful if measured in units of
conductivity
(Siemens, milliSiemens or - most likely - microSiemens).

Cheers,
Alf

oh sorry...

i forgot to mention that he is actually looking for a circuit
so thats why i asked

and yes siemens i think he was talking about

so yes if anyone has any useful circuits or places to look, then the
info would be appreciated
Click to expand...
 
On 2004-02-20, John <johnsjunk.nospam@dodo.com.au> wrote:
what about mhos, the reciprocal of ohms? Measure in ohms and take its
reciprocal.
Click to expand...
Also known as Siemens...

"DJ" <Garbage.davidjudy@optusnet.com.au> wrote in message
news:e3ea30dcb7m8jru20f60gkgni40uq11vai@4ax.com...
On Fri, 20 Feb 2004 05:52:19 +1100, "#HISH" <gagf2u@home.com> wrote:

Heres a suggestion...
Go buy one!!!

Not a bad suggestion. Pocket water conductivity meters are around $100.
Try
hydroponics shops.

Alternatively remember Google is your friend.

HTH
Wayne
"Matteo" <matteo-at-ii-dot-net> wrote in message
news:4034ed66$0$22507$5a62ac22@freenews.iinet.net.au...

"Unbeliever" <alfkatz@remove.the.bleedin.obvious.ieee.org> wrote in
message news:4034ec96$0$29131$afc38c87@news.optusnet.com.au...
Good for him,

Thanks for the information.

However it might be more useful if measured in units of
conductivity
(Siemens, milliSiemens or - most likely - microSiemens).

Cheers,
Alf

oh sorry...

i forgot to mention that he is actually looking for a circuit
so thats why i asked

and yes siemens i think he was talking about

so yes if anyone has any useful circuits or places to look, then the
info would be appreciated
Click to expand...

--
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Version: 3.1
GIT d- s: a--- C+++ UL++++ UB+++ P+ L++ W+ N++
w--- PGP++ t+ 5++ X++ tv b DI+ D++
------END GEEK CODE BLOCK------
 
It is not that easy to do.
Polarisation at the electrodes is one problem.
If you use ac to overcome the polarisation, then the high dielectric
constant of the water introduces capacitance effects.
Any salts in the water cause corrosion of metal electrodes as well.

You can make one with two metal plates of known area and spaced a known
distance apart. then the results that you get from measuring the resitance
between them can be used to calculate the conductivity. BUT. the electrodes
will only last for a short time before they change their surface
conductivity. And the other effects start to occur.

So, overall, it would be easier to purchase one.
 
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