Public Service Announcement about Bluelab pH pen

[Beehive]

No one played me as a punk. Take care of your shit, don’t be a slob and it’ll take care of you

You're understanding the break down to why I'm calling it a POS.

It has a flaw in design.

 

[zz420]

Been using mine for almost 5 years no issues. Calibrated it like 3 times and just rinse it off and cap it up, nothing special.

 

[bk78]

It has a flaw in design.

Oh do tell

this should be good

 

[bk78]

Could grow in living soil and throw away the ph pen

Why would I want slow growth?

 

[twentyeight.threefive]

I have noticed that with my blue labs PH pen that after I calibrate it it does not read the proper PH for an hour or two. Example I know my tapwater has a pH of 7.4 and that’s what my PH pen was reading before I calibrated it. After calibrating the pen I checked my tapwater pH and it was reading 6.4. I checked multiple samples recalibrated the pen and the same thing happened. I walked away for a couple hours came back and tested the same samples again and they read the proper 7.4 PH.The only reason I calibrated the PH pen in the first place was because the little check arrow in the bottom right hand corner was no longer checked so PS if you do not have the check arrow it’s time to calibrate.
Has anyone else experienced this with the blue labs PH pen?

I,

As xtsho said, everything can’t be 100% all the time. It’s possible you got one built on a Friday and the dude just wanted to head home for the weekend.

That's me every day.

 

[green_machine_two9er]

Why would I want slow growth?

Haha that’s ok.... I don’t even have an answer.

 

[bk78]

I,

That's me every day.

Haha

 

[PadawanWarrior]

 

[Dreminen169]

]

What was the ionic strength of these known samples? At low ionic strength, pH meters are inherently prone to drift.

Regular 7.4 tap, A known 7.0 solution & a known 9.18 solution. & yes pen has always been stored in kcl solution