Originally Posted by
JasonK
How often would a cond. probe need to be replaced?
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Very Rarely!
Two platinum electrodes which you would have to sand or be eroded with a caustic solution, they could be broken. To all intensive purposes, they will last a lifetime and certainly the lifetime of the computer itself.
"Platinum is an ideal material for not only jewelry, but also in electronics and chemistry because it does not oxidize, is tarnish- and wear-resistant and has high resistance to erosion from other chemicals."
Like the posts above have shown, they require reasonable constant housekeeping, as small amounts of algae, film will cover the surface of the electrode and will provide a small resistance to the already very low current flow required to measure the electrical resistance of the water.
As a note, I recalibrate my probes every six weeks and check the reading of the conductivity probe every week with a known sample. I do this as I am using the conductivity to alter the top up if it is high or low with RO or sea water.
Last edited by Antipodes; 28.11.2012 at 20:04.
Reason: spelling
Call me Paul !
Note: I am not GHL staff!
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