recommendations for digital ph meter
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Old 08-30-2003, 12:44 AM   #1
jart
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hello all,

i would like to find out your experiences with ph meters. which particular brand would you (not) recommend? i'd like to spend less than $100 canadian. and, no comments from you south of the border types, such as: "$100 canadian would only buy me a simple test kit." :P
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Old 08-30-2003, 05:46 PM   #2
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It is difficult to find pH meters for that price. I got mine for $99 US, but I would like one where you can set your pH digitally (instead of a dial, I want to know exactly what pH I am setting it at), but that is for a future christmas present or something. You might be able to find one used though...

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Old 08-30-2003, 09:18 PM   #3
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Pen type portable meters are the cheapest.
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Old 08-30-2003, 10:16 PM   #4
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Check out

www.aquatic-store.com

I had great success with them on my CO2 setup with pH meter probe and reactor. They have some pH meters there...a pen one goes for $38 bucks US.

Mike
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Old 08-30-2003, 10:57 PM   #5
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Quote:
Originally Posted by Guttboy
They have some pH meters there...a pen one goes for $38 bucks US.

Mike
well, that's the one i was looking at... hopefully someone on the board has some feedback on it's accuracy/ ease of use. at that price, though, seems a steal.

thanks to all who have replied thus far.
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Old 08-31-2003, 12:04 AM   #6
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I have worked with cheap pH Testers. Even though it might look like a steal, the truth often is that you get what you pay for.

Keep these things in mind:

1) Accuracy... often these have +/- 0.2, which might not be enough for you, especially if you dose your CO2 accordingly.

2) Calibration... many that I worked with need to be calibrated each time you do a measurement. Not so convenient.

3) Electrodes... they last only so long, and if they are not replaceable, or cost more than the entire unit, the steal quickly loses its attraction.

Now having said that, they are still more convenient than liquid tests, more accurate than strips, and way easier on the budget than those lab units that can cost several hundreds.
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Old 08-31-2003, 02:19 PM   #7
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Hello,
I am going to start offering the ph tester hand held with a +-.1 .
If you are interested let me know. Ihave not decided on the price yet but it will be comparable to the one currently listed
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Old 08-31-2003, 05:08 PM   #8
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Got em up there now under controllers. I did a search on the internet and could not find anyone that could beat those prices. If you find it cheaper on a commercial website you can get it 5% less than their list price!!!! For being the one to bring a lower price to my attention
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Old 08-31-2003, 05:53 PM   #9
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marc,

checked out the website. could you clarify as to which ph meters are accurate to +/- 0.1 ph units.

also, which meters do not have to be recalibrated after each use.

thanks.
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Old 08-31-2003, 08:28 PM   #10
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Hey i am throwing up more pics and info right now
The smart 51 does not have to be recalibrated each time and is accurate to +/- 0.1 ph units
Give it 5 minutes for the pics and new info to get there

http://www.aquatic-store.com/en-us/dept_258.html
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Old 08-31-2003, 11:20 PM   #11
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I am definitely impressed by your responsiveness.

Do you have any data on approx. how long an electrode lasts in these units until it has to be replaced?
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Old 09-05-2003, 06:34 PM   #12
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Not yet i am awaiting reply from milwaukee
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Old 09-05-2003, 09:05 PM   #13
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Under normal use about 1 year to 18 months. Sometimes you can clean the probe in alcohol bath for about 2 to 3 min. and that will bring them back to life if the problem is dirt buildup. This is especially true in monitors and controllers that are on all the time
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Old 09-05-2003, 11:20 PM   #14
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I use a Dupla Ph controller and sender unit. Cost $670.00 Australian and am very happy with it.

Paul
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Old 09-06-2003, 12:18 AM   #15
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Sounds like a lot of dough to me :shock:
I am thinking about getting that pH meter. I hate guessing colors :? Still, quite a diff $5 vs $55.
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