ph meter confusion

[ajw22]

If a meter supports 2 or 3 point calibration then there is usually a process that needs to be followed to ensure which calibration point is being done at a time. Should be described in the manual.

The yellow meter does not have multiple calibration points. It has one calibration point that you stick the meter in the calibrating solution and adjust the reading with a screwdriver to match the calibration.

 

[mgtfp]

The yellow meter does not have multiple calibration points. It has one calibration point that you stick the meter in the calibrating solution and adjust the reading with a screwdriver to match the calibration.

Thanks for the clarification. Bit pointless this 1-point calibration business...

 

[ajw22]

Thanks for the clarification. Bit pointless this 1-point calibration business...

It’s a low budget meter.

 

[KevMo]

I have had good luck with the ORAPXI pH and Salt Meter. I have the Apera pH20 as well, but I like the ORAPXI better. It only costs $35. The pH and salt readings correlate well with my with TFPro w/ Salt Test kit. I have only had it 4 months so I can't speak to the longevity yet. Based on my experience thus far, I wouldn't mind buying a new one every year.

 

[duraleigh]

That meter is in fact "low budget".

By far, the most dependable and accurate pH "meter" is the phenol Red drops based testing block that is found in all TFTestkits products. It's the cheapest, most repeatable pH test on the market. It does, however, take some familiarization and many end users aren't willing to take the time learning to interpret it correctly.

Instead, they think "digital" results are wa-a-a-y better and are eager to jump at the digital pH testers. I think that's a big mistake.

Digital meters cost a lot more and even the most expensive ones require ongoing maintenance. Their supposed accuracy down to the 100th is preposterously irrelevant to a pH test but people still get lulled into that "digital" accuracy.

So, if you really want to manage your pool water properly, test your pH with the R-0014 Phenol Red Color Comparator block. Secondly, learn how to use it. You can EFFECTIVELY match any digital tester and you will have saved yourself 50-150 bucks

 

[tfpflana1502]

That meter is in fact "low budget".

By far, the most dependable and accurate pH "meter" is the phenol Red drops based testing block that is found in all TFTestkits products. It's the cheapest, most repeatable pH test on the market. It does, however, take some familiarization and many end users aren't willing to take the time learning to interpret it correctly.

Instead, they think "digital" results are wa-a-a-y better and are eager to jump at the digital pH testers. I think that's a big mistake.

Digital meters cost a lot more and even the most expensive ones require ongoing maintenance. Their supposed accuracy down to the 100th is preposterously irrelevant to a pH test but people still get lulled into that "digital" accuracy.

So, if you really want to manage your pool water properly, test your pH with the R-0014 Phenol Red Color Comparator block. Secondly, learn how to use it. You can EFFECTIVELY match any digital tester and you will have saved yourself 50-150 bucks

You don't need my agreement here, but I agree that the titration approach is much more reliable.