pH meter recommendations

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

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

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

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.

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:

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

and

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.

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

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

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