PH Pens

[Porky]

Calebration

We guna calibrate and have a time......

 

[Old Ant]

I work with environmental sensors for a living and deal with pH sensors that cost $2K to $50K. Just throwing that out there, I'm not pulling this info from my arse or Reddit! One thing most people don't understand is how a pH electrode ages. To put it in simple terms, the electrode (aka measurement thingy) starts decaying the moment it is manufactured. Yes, you need to keep the glass bulb moist with a correct KCl buffer solution. Yes, you need to calibrate them frequently. But, even with buffer solution and calibrations, your electrode will lose measurement stability over time. The electrode is "eating" itself during it's normal operation or sitting in storage. It is probably not what everyone wants to hear, but if that electrode is more than a year old, it's degraded too far to be truly useful.

Get yourself an Ohaus ST10 or similar. They have user replaceable electrodes and are made for laboratories, not the hydro market which typically serves up disposable junk.

Cheers for the factual info veritas629 always appreciate industry related experience, time to upgrade some more essential equipment again Still a learner driver here….just found out about the AC infinity cloudray s6 fans thanks to TSE forum guys n gals finally gettin off the seahawk, gardis pro merry go round

 

[veritas629]

Happy to help! I have a wealth of knowledge about water chemistry due to my education and career. Funny thing, I found hydro growing too much like my work and switched to organic soil for more fun!

 

[Hudo]

Happy to help! I have a wealth of knowledge about water chemistry due to my education and career. Funny thing, I found hydro growing too much like my work and switched to organic soil for more fun!

Always the way mate, I'm always arguing with my wife about laying bricks around my house she can't understand why unless it's absolutely necessary I go out of my way to avoid it. I'm like I hate laying the fuckers when I'm getting paid be fucked if I'm doing it for free

 

[Hudo]

Blue lab it is through sheer desperation i needed one now so desperation won the battle of the pens

 

[Porky]

Blue lab it is through sheer desperation i needed one now so desperation won the battle of the pens View attachment 32287

You got the new on too!
I have a mate who has one that is 7 years old and it still seems to work fine for him!
@veritas629 do you think it's still accurate being that old??
His plants look fine but your in the know so be interested to here your opinion mate!

 

[Hudo]

You got the new on too!

Is it a new model or somthing ?

 

[Hudo]

It's doing its 24 hour pre soak . It's got liquid inside the little glass dome ?

 

[Porky]

Is it a new model or somthing ?

Probably the same inside just different buttons. Well same buttons just different shape!

 

[veritas629]

You got the new on too!
I have a mate who has one that is 7 years old and it still seems to work fine for him!
@veritas629 do you think it's still accurate being that old??
His plants look fine but your in the know so be interested to here your opinion mate!

I've never played with a Bluelab instrument, but the principals should be the same. I wouldn't trust it after that long. That said, it will give a reading and that reading might be accurate enough for your mate's purposes. If his hydro plants are happy, it must be close enough! Despite my OCD-like desire to have every sensor as accurate & precise as possible, I also believe if something is working well then don't fuck with it....