Hanna pH Meter Vs Cheap Meter

Hanna pH Meter Vs Cheap $10 meter from Amazon. The Hanna was stored in their electrode solution, the cheapie just washed with DI and stored dry. Hanna has been calibrated properly twice l, as recently as a few days ago. The cheapie was single point calibrated in pH 4.01 two weeks ago! I would never trade precision for accuracy, the performance of the Hanna is disappointing to say the least. The 4.01 buffer would need to be nearly 100 degrees for that reading to be correct, it's just flat out inaccurate.

[timturk]

I've noticed that with my cheap yellow meter that when under my kitchen lighting, very bright without much spread. That light directly above me wouldn't let the meter stabilize. I turned it off and turned on a light farther away from the meter and it stabilized the setting. Put it under direct light and it's unstable, changing the pH number. Anyone know why this happens? Very strange!

[timturk]

I have an exact looking meter myself, same color and made from the same mold(?), but also says ATC on it (Automatic Temperature Compensation (?)). It also came with a PPM meter for under ten dollars on eBay. Mine doesn't seem to accurate though as yours. Do you think many Chinese manufactures make these? And quality could be different. The PPM-3 works great! I bought another set from another company and they say calibrated at the factory, so I went to switch batteries in the identical looking pH meters and the other requires four batteries rather than three like the first one. Strange! I'm glad you'res is working well. I'm mostly organic, so I really don't have to have one. I do have a GH liquid test kit I rely on to check the meter and feedings once in awhile, and all seems ok. Thanks for the video brother!

[Munky]

i have a cheapy meter. i'm pretty anal with it though, its a similiar model to the one you have except mine has N.nn digits. i Do a "2 point" verification with it. i usually set it to ~7.01, then verify how close the 4.01 solution is. if its way out of wack, which it is usually within .15 or so, i usually split the difference so that either side is only .07 off. only reason really is because when I ordered the buffer solution, it was cheaper to get a 2 bottle kit than a single bottle, and it apparently only lasts for a few months anyways.

i've only had it a month, but I store mine with the cap full of a small amount of 7.01 buffer solution inside the cap. works great and holds its calibration within .05 or so every use.

either way, even if it was slightly out of spec, it'd still be significantly MORE accurate than the drop tester - which I had be using for quite some time...

even if I had to replace the meter like every 2-3 months with some buffer solution, it'd still be cheaper to do that for a year than to get some expensive meter.

[cujopitman]

All a marketing scam Hannah was the cheapest on the market with the little screw to calibrate it still use it today little red one with the black probe

[AhmedSafaa]

Please, I am making liquid soap and I need a PH meter, do you think this cheap yellow one will work fine?

[dar]

Any have their reading on the cheaper one bounce around?

[fabulos]

There are a lot of factors that go into getting an accurate measurement. As stated the Chinese knockoff was calibrated to pH 4, what value do you expect to read in pH4 after calibrating to that value? Was the Hanna meter calibrated to pH 4.01 or only to pH 7.01? If you just calibrated the meter to both points then there is no reason why it should not read after calibration. Calibration forces the meter to read that value until something happens to the probe or the solution. So if you calibrated to pH 4.01 then the meter will read pH 4.01 after calibration.

Proper technique would be to Rinse probe in DI water and use two beakers for each buffer. One for a buffer rinse and the other for actual calibration. Two point is recommended so that both offset (pH 7 ) and slope (4/10) are determined.

pHep 5 is waterproof, ATC, stability indicator, auto calibration, battery percent level at start up, both pH and temperature reading and has a replaceable pH electrode with an extractable junction.

The Chinese knockoff of the original pHep (HI96107) has none of the above.

[craiglyons]

Are you supposed to store the cheap meter dry?  I just bought one and would like to know how to store it.  Thanks

[sleepwalker]

$100 digital PH meter is cheap. They got ones for $1, 500 marijuana stores use.

[ironwillaesthetics]

Hey James how do you get your meter to read 3 digits like (4.01 or 7.01)? Mine reads only 2 digits like (4.0 or 7.0) and I cannot find my instruction manual. Also where did you pickup the cheapie meter?

[MountainHomeSupplyCoowner]

I am gettiing my chemical applicator license and was looking at the Hanna Meter but this cheap meter in your test surprised me. Being that I am just testing soil in residential yards would you think the cheaper(and it diesnt have to be the cheapest, but cheaper than the hanna) would be ok for my needs?