pH meter recommendations

[glad heart]

Any suggestions on brand/model for pH meters??

I found this one: http://valleyvintner.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=TVV&Product_Code=TES6PH

I like the price. Do I need anything more elaborate?

Thanks

[Ray]

That's a good price. Not much more than replacement probes on the more
expensive ones. If it fails, replace it. Accuracy is probably adequate.
Let us know how it works.

Ray

"glad heart" <C2H5O...@yahoo.ca> wrote in message
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[Charles]

Ray wrote:

> That's a good price. Not much more than replacement probes on the more
> expensive ones. If it fails, replace it. Accuracy is probably adequate.
> Let us know how it works.

Isn't Accuracy of +/- 0.2pH the same as narrow range pH paper?

--
charles

"Once ... in the wilds of Afghanistan, I lost my corkscrew, and we were
forced to live on nothing but food and water for days."
- W.C. Fields

[Ray]

You are probably right. But the paper does not include a digital read out
so you can get the accuracy. ;o) I have trouble reading color changes.

Ray

"Charles" <spam.c...@uwaterloo.ca> wrote in message
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[seb]

C2H5O...@yahoo.ca (glad heart) wrote in message news:<ccd37cb9.03092...@posting.google.com>...

I have this model and really like it. You can buy some bench work
model that are more durable and accurate but at an average of $150 and
more. So, I think that it's a good buy for the money and enough
accurate for most amateur winemakers. Also, I buy a few time from
Valley Vintner and this is a very good place to buy from. Also, they
give you a Ferm-rite silicone bung with each order and they are very
special.

[Negodki]

C2H5O...@yahoo.ca (glad heart) wrote:

You get what you pay for. This meter has any accuracy of only +/- 0.2
pH. You need at least +/- 0.1, and preferably +/- 0.05.

Why? A pH of 3.0 is too low. A pH of 3.1 may be acceptable. A pH of
3.2 is ok.

With an accuracy of +/- 0.2, a reading of 3.2 may actually be 3.0 -
3.4. With an accuracy of +/- 0.1, a reading of 3.2 may actually be 3.1
- 3.2. With an accuracy of +/- 0.05, a reading of 3.2 is 3.15-3.25.

Here are the specifications for two meters with greater accuracy and
more features: http://www.enviroequip.com/sales/phep4&5.htm. The pHEP4
has a +/-0.1 accuracy, and the pHEP5 has a +/- 0.01 accuracy.

The pHEP4 costs about $60, and the pHEP5 $70, from a number of
sources, including http://www.secure.sciencecompany.com/thesciencecompany/category.cfm?sid=1&category_id=77
and www.piwine.com.

All the reviews I've seen for the pHEP5 have been favorable, and
prefer it to similarly priced competition. It's the meter I intend to
purchase soon.

[Ourfamily]

Here is another brand to look at:

http://www.omega.com/ppt/pptsc.asp?ref=CDH5021&nav=grebb02

"glad heart" <C2H5O...@yahoo.ca> wrote in message
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[Richard Kovach]

I bought one 2 years ago that was incredibly flaky due to being stored
on the shelf far too long. After buying a new probe last year from a
large vendor that has lots of stock turnover, it worked very well.
But only until the second day of this year's crush, when it completely
flaked out again -- in spite of always being properly cleaned and
stored properly in buffer solution.

I will be buying something significantly more expensive and would
definitely not recommend this one as I've only had a total of maybe an
hour or two of use out of two probes. Perhaps it's just bad luck, but
I doubt I'll buy any Hanna pH meter after this experience -- I can't
help but think that any generally good equipment maker would never put
out a product this finicky or unreliable.

Richard

C2H5O...@yahoo.ca (glad heart) wrote in message news:<ccd37cb9.03092...@posting.google.com>...

[Richard Kovach]

Oops -- meant to say "storage solution". Storing in buffer solution
might cause probe failure, but it was storage solution that I've been
using!

Richard

rko...@popmail.com (Richard Kovach) wrote in message news:<d5715781.03092...@posting.google.com>...

[Negodki]

C2H5O...@yahoo.ca (glad heart) wrote:

> I found this one: http://valleyvintner.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=TVV&Product_Code=TES6PH
> I like the price. Do I need anything more elaborate?

If you do decide to purchase this model, Grainger has it fo $25.

http://www.grainger.com/

[zinman]

rko...@popmail.com (Richard Kovach) wrote in message news:<d5715781.03092...@posting.google.com>...

[Joe Sallustio]

It's an awful meter, the probe is much more important that the meter
and you can't get the accuracy needed for $25. A good meter and probe
will last several years, this one did not for me.

If you are willing to spend from $50 to $75 on the meter, there are
much better alternatives, most already posted. The one mentioned here
are excellent.

Omega, Cole Parmer, Granger and Fisher Scientific all supply decent
meters for under $75. I can repost the pH meter FAQ if you would like,
but it's on Googles archives several times.

Several online wine supply house now stock the pHEP5 if that one
interests you, I have it and like it.

Don't forget the calibration solutions (buffers), they are more
important than the meter. It is a log device and a little drift can
add up to significant error
Regards,
Joe

on rko...@popmail.com (Richard Kovach) wrote in message news:<d5715781.03092...@posting.google.com>...

[glad heart]

Thanks everyone for your great contributions. The pHEP5 looks like a
good choice. The "pH meter FAQ" is excellent Joe.