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Old 01-14-2014, 03:10 AM   #11
pogden
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Quote:
Originally Posted by monkeyman1000 View Post
So I just rechecked it against my Thermapen. It read 65.9 and the Thermapen read 65 so not sure what happened yesterday. I wasn't even drinking.
Well, there you go! I guess if there's a lesson to be learned its never, EVER fool around with a pH meter when you're not drinking.

Kidding aside, thanks for the discussion on this. I sort of assumed the premixed buffer would expire at some point, but I expected it to last a bit longer than 4 months. Pillows (or singlets) for me.

Do you guys just put the sample to be measured in the pH meter cap?

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Old 01-14-2014, 03:32 AM   #12
jsguitar
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Quote:
Originally Posted by pogden View Post
Do you guys just put the sample to be measured in the pH meter cap?
Yep, fill it halfway and cool first.

 
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Old 02-04-2014, 06:32 PM   #13
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Jumping into an older post, but wondering if others have tried to order this meter? I am told that it is delayed for a couple weeks (mid-Feb).

 
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Old 02-06-2014, 06:00 PM   #14
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Quote:
Originally Posted by Ohbsolutely View Post
Jumping into an older post, but wondering if others have tried to order this meter? I am told that it is delayed for a couple weeks (mid-Feb).
Just pulled the trigger on this. Hach quoted a one month lead time on this. Hopefully it's less than that... waiting for brewing equipment blows.

 
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Old 02-10-2014, 07:40 AM   #15
pogden
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I ordered mine in mid-January and it is indeed on backorder. I called them last week and they told me that the anticipated ship date of 6 Feb still looked good. We shall see ... Waiting for being equipment definitely blows.

 
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Old 03-01-2014, 06:15 AM   #16
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Mine finally arrived yesterday. Looking forward to using it.

 
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Old 03-01-2014, 03:08 PM   #17
Ohbsolutely
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Just got mine too. Looks as described so far...


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Old 07-24-2015, 07:25 PM   #18
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I've been doing AG for a bit now and am interested in tinkering with water additions and pH. I'm wondering if anyone has now tried the $70 Hach Pocket Pro pH meter (model no. 9531000)? I understand that it has a significantly lower accuracy ( 0.1 pH vs. 0.02 pH) than the $115 Pocket Pro + (model no. 9532000), but wonder how important that difference is in the context of mash pH measurements (i.e. if I get a reading of 5.2 with the cheaper meter, does it matter that the actual pH could be as low as 5.1 or as high as 5.3?) In other words, I'm wondering if the extra accuracy is really worth an extra $45, given that I'll be using the pH meter exclusive for homebrewing and won't have other occasion to take advantage of increased accuracy.

 
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Old 07-24-2015, 07:58 PM   #19
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You really do need the resolution to see variations in the hundreths even though we are only worried about pH to about a tenth. The finer resolution enables you to discern where the pH is leaning instead of guessing if the pH was 5.44 (which reports as 5.4) or 5.46 (which reports as 5.5) or points between.
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Old 07-25-2015, 11:10 AM   #20
ajdelange
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Well this is silly. I just realized that the response below is to an old post (#10) not the one pup up today. Nevertheless, here it is as it might be of interest to someone.

Remember that the Thermapen uses a thermocouple whereas the pH meter probably uses a thermistor or RTD and has, thus, the potential for greater accuracy which doesn't, of course, preclude the possibility of a defective RTD or thermistor. I would suggest calibrating the two meters with an ice water bath before drawing conclusions about either. This is a little trickier than it at first seems. You need a lot of ice in a insulated (e.g. styrofoam coffee cup, heavy ceramic mug) with enough water to fill the spaces between the ice cubes. What is often not stated is that you have to wait for the water and ice to come to equilibrium. The ice just out of the freezer is colder than 32 F and the water is clearly warmer. After 5 minutes or more with gentle stirring insert the thermometer to be checked so that it only touches the liquid. FWIW my Thermopen reads 33.4F in an ice bath and a Fluke Type K thermocouple (which is what I assume is in the Thermopen as well) with a Fluke multimeter reads 31.0 F. These are typical Type K accuracies.

 
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