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Old 03-09-2010, 04:27 PM   #1
Carz
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Question Dymax pH Meter

I'm considering a pH meter and saw the Dymax pH Meter and like the black colour, blue led and slim looks very much cos it goes very well with my black Fluval Edge with modded blue moonlight LED. I'll be keeping shellies in pH9+/-.

However, I got a few qns before buying:
  1. I read from Wiki "Calibration should be performed with at least two standard buffer solutions that span the range of pH values to be measured" However, lfs and even Dymax showroom comment only need pH7. So do we need 2 points calibration for accuracy? If using only pH7 is not accurate, won't it then defeats the purpose of using a pH meter. Who is correct?
  2. I see Pinpoint pH Meter has pH10 calibration i.e. pH4 & pH10 uses the same "slope". Dymax's only has pH7 and pH4 buffer solution and not pH10. Does that means it does not allow the same? If so, will it affects accuracy between pH7 and pH10? If it allows the same, does that means I should use other brand buffer solution for pH7 and pH10?
  3. Double confirm Dymax's probe can be full submerged in water?
  4. Is Dymax's an OPR meter as well but need a different probe?
  5. Anyone knows of a similar good looking pH meter that I can consider?
Thanks!
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Old 03-09-2010, 04:30 PM   #2
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Oh almost forgot, where can I get it at best price? Lowest quoted so far is $155, buffering solution $9 to $10 each.

One bro says he got at $135 in Feb this year from Seaview/Nanyang but they refused to quote me over the phone but says higher than $135.
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Old 03-09-2010, 05:14 PM   #3
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Bro, I guess that's their usual practise not to quote over the phone. Better to go there to see. I also check with them a few times, also say no price quoting on the phone.
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Old 03-09-2010, 06:11 PM   #4
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Sorry I forgot to mentioned lady over the phone says is their policy. I don't blame them but leh chey to go down just to check price cos I've already seen the product elsewhere but couldn't make up my mind to purchase.

I'm more concern with my qns in post 1.
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Old 03-09-2010, 09:49 PM   #5
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This Digital pH Monitor Tester Meter Adapter Thermometer also fits my needs being small & mountable, colour matching and furthermore with thermometer which I'll be getting separately anyway but I guess nobody knows how's the quality?



At 1/3 the price of Dymax's should I consider as I'm thinking a pH meter in my small tank is already overkill or small tank pH fluctuates even more thus all the more I need one? I guess if it's reasonably accurate and last at least 1 yr, it would have more than justifies the low price. I don't like the idea of using a pen cos if I do, I would have considered a test kit.
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Old 04-09-2010, 11:57 PM   #6
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Old 04-09-2010, 11:59 PM   #7
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which one will look good with your setup? you decide...
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Old 05-09-2010, 12:12 AM   #8
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as we only use ph7 for fresh water tank (HDB tap water ave. btw 7 to 8). so don need to calibrate ph4 or ph10.

unless u need that reading.^^
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Old 05-09-2010, 02:10 AM   #9
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@ymmij, you using the Dymax pH Meter as well right? How would you rate it so far?
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Old 05-09-2010, 02:12 AM   #10
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@Ryan Red, I guess pH7 is enough but if I really want to be anal or need to confirm accuracy, I suppose all pH meters should allow slope calibration base on either pH4 or 10.
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