PH & Conductivity meter

luke

Senior Member
Joined
2008
Posts
89
Geo
Australia
Morning fellow printers,

Looking at purchasing a PH & Conductivity meter; is it a waste of money getting one that only reads up to 2000 us cm ?

(bit confused as some fountain solution list to run at eg 1500 ms cm and others say 1500 us cm.) I thought that us cm = ms cm x 1000. Have they just made a mistake and used the wrong notation.

listed are a few I've come across, any info you have on what to look for would be greatly appreciated.
I'm thinking possible the Hanna combo meter.

http://www.hannainst.com/usa/prods2.cfm?id=002003&ProdCode=HI 98129

http://www.milwaukeemeters.com.au/SMART PORTABLE METERS/sm801.htm

http://www.milwaukeemeters.com.au/MARTINI PORTABLE METERS/Mi805.htm

Regards
Luke.
 
The Hanna 98129 should be fine.
 
    • Thanks for that,
    Just noticed the Hana meter goes up to 4000 us cm, so thats the one I shall purchase.
     
    luke i think a conductivity meter that reads up to 2000 ppm is fine. if your reading off the scale on a 2000 ppm meter then its time to replenish your fountain solution anyways
     
    dude i bought my PH & Conductivity meter on ebay, way cheaper than buying through a print supplier. Pool and garden shops also sell them.
     
    Good to know,, ebay yeah why not....
    jetscreamer said:
    dude i bought my PH & Conductivity meter on ebay, way cheaper than buying through a print supplier. Pool and garden shops also sell them.
    Click to expand...
     
    RO water is pretty much standard in the states , dont know about the rest of the world....The few times we had to switch to city water I can remember it making a distictive difference....
    Well this guy Im getting the Komori going for went and bought a high priced Con. meter and I told him to get his money back , seriously for one small press that runs one shift?? no real need for one , a densitomitor I could use more so.....

    Steve
     
    Purchased the Hanna meter.
    Stevo - The shop I used to work for wouldn't puchase a PH/Conductivity meter, so 7 years I printed there with no meter. The problem is though without it, when you are having problems it makes it harder to do trouble shooting.

    The particular Hanna meter I purchased is at the lower end of the $ spectrum, but should be all I need.
     
    I hear ya luke , but he bought a high end meter so an auction or ebay and maybe we can get a used Myron , but like I said I need a densitometor right now....I found a few on ebay reasonably priced....

    luke said:
    Purchased the Hanna meter.
    Stevo - The shop I used to work for wouldn't puchase a PH/Conductivity meter, so 7 years I printed there with no meter. The problem is though without it, when you are having problems it makes it harder to do trouble shooting.

    The particular Hanna meter I purchased is at the lower end of the $ spectrum, but should be all I need.
    Click to expand...
     
    turbotom1052 said:
    luke i think a conductivity meter that reads up to 2000 ppm is fine. if your reading off the scale on a 2000 ppm meter then its time to replenish your fountain solution anyways
    Click to expand...

    ppm is the measuring unit for water hardness,[Parts per million (ppm)
    Usually defined as one milligram of calcium carbonate (CaCO3) per litre of water].....
    correct me if I am wrong.
     
    • Conductivity to TDS comversion

    aqazi81 said:
    ppm is the measuring unit for water hardness,[Parts per million (ppm)
    Usually defined as one milligram of calcium carbonate (CaCO3) per litre of water].....
    correct me if I am wrong.
    Click to expand...

    Just to clarify for anyone that may be digging around through old posts looking for information...

    PPM stands for parts per million and is a unit of measure for Total Dissolved Solids (TDS). This applies to many application, not just water hardness.

    Micromhos or Microsiemens is a unit of measure for Conductivity.

    The relationship between conductivity and TDS is non-linear and no single multiplier can be used to convert between the two. TDS is dependent on the type of mineral and does not only refer to calcium carbonate.

    You can take a look at this article to see what I mean: Conductivity to TDS conversion

    Different minerals have a different conductance value.

    Again, just to clarify...

    Hope that helps,
    Jim Rutan
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