Meassuring Resistance under water?

[HappMatt]

Hey,

So as part of a experiment I am curious to be able to measure the resistance of a wire as I joule heat it under water to be able to get a steady state temp vs current. My thought is to attach electrodes to a metal wire to put a current across it and measure a voltage drop(4 point probe). I would likely use insulated leads attached to the wire that i want to measure. Additionally I would put the wire in distilled water when I make the measurements. So my thought is that since the resistance of the water is so much greater than that of the water I should be able to get a relatively accurate measurements. Does this make sense or am I missing something.

Thanks
Matt

 

[berkeman]

Hey,

So as part of a experiment I am curious to be able to measure the resistance of a wire as I joule heat it under water to be able to get a steady state temp vs current. My thought is to attach electrodes to a metal wire to put a current across it and measure a voltage drop(4 point probe). I would likely use insulated leads attached to the wire that i want to measure. Additionally I would put the wire in distilled water when I make the measurements. So my thought is that since the resistance of the water is so much greater than that of the water I should be able to get a relatively accurate measurements. Does this make sense or am I missing something.

Thanks
Matt

Makes perfect sense, except for the simple typo in your next to last sentence. You should be fine.

 

[HappMatt]

Makes perfect sense, except for the simple typo in your next to last sentence. You should be fine.

sense instead of since? not the first time and I actually meant to type it that way.
Thanks
Matt

 

[Mech_Engineer]

... So my thought is that since the resistance of the water is so much greater than that of the water I should be able to get a relatively accurate measurements...

Your typo was saying that you plan to compare the resistance of the water to the water (itself).

 

[berkeman]

Yeah, change the 2nd water --> resistor.