Re: Conductivity meter vs. TDS meter

[Brian Ahmer <ahmer.1@osu.edu>]

Title: Re: Conductivity meter vs. TDS meter

As far as I understand, they are the exact same thing EXCEPT that they have different scales.  All the meters do is read conductivity and then multiply by a constant to get TDS units.  So if you set it on conductivity, that's what you get.  If you set it on TDS, you get conductivity times a number.

I bought the low end Hanna model (green skinny thing), I think it was called the TDS-1.  It was awful for a bunch of reasons.  Mainly it was incredibly inaccurate and fluctuated all over the place (I have scientific meters in my lab at work, so I knew it was wrong).  I exchanged it for the next model up (black box with a probe on the end of a wire) which was just under $200.  That one is really nice.



Brian Ahmer
ahmer.1@osu.edu
http://www.angelfire.com/or/biggestbri



on 1/9/02 8:56 PM, Dave Littlehale at rdlittle3@home.com wrote:

> I read someplace on the list recently that the only stupid question is the one that doesn't get asked.  I'm not sure if this is one or not, but could someone explain the difference between the two meters, what they test for, and how the results are different and/or related?
>  
> I called and spoke to someone at Pet Warehouse and their answer related to products they sell, and I sent an email to Hanna Instruments and haven't received a reply.
>  
> I appreciate all the good knowledge that is passed through the list.
>  
> Thank you
>  
> Dave