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My name is Bob
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 Posted: Thu Dec 28, 2006 11:38 am Post subject: Would gold conductivity electrodes be as good as carbon, pla |
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Hi, I want to make a conductivity meter (for salty water) that has to last
a long time.
I see a lot of electrodes made out of 'platinum black', carbon or even
titanium.
I was wondering if a PCB with two gold plated contacts on it would suffice?
It seems to me gold is unreactive, with only a very small AC current between
the two contacts it won>t corrode will it?
I know I could buy one but I want to make it myself.
Thanks. |
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Robert Baer
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| Posted: Fri Dec 29, 2006 4:27 am Post subject: Re: Would gold conductivity electrodes be as good as carbon, |
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My name is Bob wrote:
[quote]Hi, I want to make a conductivity meter (for salty water) that has to last
a long time.
I see a lot of electrodes made out of 'platinum black', carbon or even
titanium.
I was wondering if a PCB with two gold plated contacts on it would suffice?
It seems to me gold is unreactive, with only a very small AC current between
the two contacts it won>t corrode will it?
I know I could buy one but I want to make it myself.
Thanks.
You are correct in that gold does not corrode, but be advised that[/quote]
current between electrodes means that some kind of compound gets
"plated" on at least one of the electrodes, thereby contaminating them.
Also, the plating on copper traces may not completely cover the
copper (especiallyu the edges); that makes for an electrochemical cell
right there (possible problems in measurements and electrode lifetime). |
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My name is Bob
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| Posted: Sat Dec 30, 2006 4:44 pm Post subject: Re: Would gold conductivity electrodes be as good as carbon, |
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| Thanks again Robert. |
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mark krawczuk
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| Posted: Sat Dec 29, 2007 5:59 pm Post subject: Re: Would gold conductivity electrodes be as good as carbon, |
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hi, as far as i know , silver has better conductivity than gold , but the
problem being is that silver tarnishes easy, whereas gold doesnt , so gold
is the next best choice.
mark k
"My name is Bob" <mixmaster5@hotmail.com> wrote in message
news:5LIkh.125314$jO5.47484@fe06.news.easynews.com...
[quote]Hi, I want to make a conductivity meter (for salty water) that has to
last a long time.
I see a lot of electrodes made out of 'platinum black', carbon or even
titanium.
I was wondering if a PCB with two gold plated contacts on it would
suffice? It seems to me gold is unreactive, with only a very small AC
current between the two contacts it won>t corrode will it?
I know I could buy one but I want to make it myself.
Thanks.
[/quote] |
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mark krawczuk
Guest
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| Posted: Mon Jan 21, 2008 3:46 am Post subject: Re: Would gold conductivity electrodes be as good as carbon, |
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hi, as far as i know silver is a better conductor than gold , but silver
tarnishes easier than gold .
mark k
"My name is Bob" <mixmaster5@hotmail.com> wrote in message
news:5LIkh.125314$jO5.47484@fe06.news.easynews.com...
[quote]Hi, I want to make a conductivity meter (for salty water) that has to
last a long time.
I see a lot of electrodes made out of 'platinum black', carbon or even
titanium.
I was wondering if a PCB with two gold plated contacts on it would
suffice? It seems to me gold is unreactive, with only a very small AC
current between the two contacts it won>t corrode will it?
I know I could buy one but I want to make it myself.
Thanks.
[/quote] |
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Jakthehammer
Guest
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| Posted: Mon Feb 04, 2008 5:47 pm Post subject: Re: Would gold conductivity electrodes be as good as carbon, |
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"mark krawczuk" <krawczuk@adam.com.au> wrote in message
news:TdadnQlub-vyIg7anZ2dnUVZ_rqlnZ2d@adnap.net.au...
[quote]hi, as far as i know silver is a better conductor than gold , but
silver
tarnishes easier than gold .
mark k
"My name is Bob" <mixmaster5@hotmail.com> wrote in message
news:5LIkh.125314$jO5.47484@fe06.news.easynews.com...
Hi, I want to make a conductivity meter (for salty water) that has to
last a long time.
I see a lot of electrodes made out of 'platinum black', carbon or even
titanium.
I was wondering if a PCB with two gold plated contacts on it would
suffice? It seems to me gold is unreactive, with only a very small AC
current between the two contacts it won>t corrode will it?
I know I could buy one but I want to make it myself.
Thanks.
[/quote]
I recommend using Chromium or stainless with lots of Chromium.
Conductivity is as good as Gold, cheaper long lasting in solution like salt
water. Just remember, Do not waste your money on Hydrogen Scam.
Jack. |
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