RogueRose
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Corning 320 pH meter - missing probe when arrived - any suggestions on alternatives?
I know that a lot electronics use various probes, connections, etc that vary greatly from one manufacturer to another, but they are all basically
interchangeable, the only difference is physical size/shape and the connector size (wire connector). None of this is a problem as I can change the
wire connectors to fit my needs. Physical sizes can be overcome using the holder I already have.
The connector on the back of my unit has a pH, ATC and REC jacks in BNC type F, composite coaxial jack (RCA type jack) and some 5 pin "Large PS2 type
connector" respectively. I can swap out connectors for the appropriate plug, so compatibility doesn't matter here.
Can anyone suggest a probe that may work for this?
Here is the back of the device, the only thing I have is the DC power. The one second from the bottom is what I'm not sure what it is called, anyone
knows I'd appreciate knowing. Thanks!
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unionised
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The "rec" socket is an output proportional to the pH which is meant to be connected to a chart recorder (hence the name).
That sort of connector is a DIN standard socket
https://en.wikipedia.org/wiki/DIN_connector
ATC is the automatic temperature compensation- and that may be your big problem.
It's designed to connect to some sort of temperature sensor. Without knowing what sensor to use you may have a problem. On the other hand, with luck,
you might get it to work with nothing connected.
The BNC socket is for the actual pH probe.
If you are lucky you might be able to use another electrode (try ebay)
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NEMO-Chemistry
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https://www.thomassci.com/Instruments/Electrodes-pH/_/pH-MET...
ouch
this is the type of probe needed
"The Corning Model 320 pH meter uses a sensing electrode and a reference electrode in combination. The sensing (pH) electrode or element has an
internal buffer solution with a constant pH value and develops a potential (difference between inner and outer ionic charge) when placed in a
solution. This is caused by the activity (concentration) of H+ in the solution. The reference electrode or element has a defined, stable potential
irrespective of the H+ activity in the sample. The 320 measures and converts the resulting minute electrode voltages into a pH reading. The response
of the pH electrode is defined by the Nernst equation. "
taken from
https://www.hitechtrader.com/Analyzers-Meters/pH/Corning-Mod...
You can use with out the ATC if the solution is 25C, More info on calibrating can be found here
https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=...
I havnt found a manual though
[Edited on 31-12-2017 by NEMO-Chemistry]
[Edited on 31-12-2017 by NEMO-Chemistry]
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unionised
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https://www.ebay.co.uk/p/10x-aquarium-Electrode-Probe-BNC-Co...
Other cheap junk is also available, but at that price,, it's worth a try.
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NEMO-Chemistry
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I have used that model, actually for CO2 system in a fish tank! Its complete junk, i would try and find a better one. Mine actually leaked the
internal solution!
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