We've Moved! Visit our NEW FORUM to join the latest discussions. This is an archive of our previous conversations...

You can find the login page for the old forum here.
CHATPRIVACYDONATELOGINREGISTER
DMT-Nexus
FAQWIKIHEALTH & SAFETYARTATTITUDEACTIVE TOPICS
pH testing, paper strips or an electronic device Options
 
panoramix
#1 Posted : 12/19/2009 9:19:13 AM

DMT-Nexus member


Posts: 162
Joined: 01-Dec-2009
Last visit: 09-Apr-2016
Location: TreeHouse
mombreast wrote:
It may not belong to Advanced at all, but i have a question.
Which do you like for testing pH, paper or an electronic device?

I found a nice pH meter but it's about $300.....

i wold just go with ph paper, i have digita ph meter but ou neet to calibrate it all the time with some ph fluit. its ust ezier to get ph paper 100 strips is about 7 bucks.

greets
Panoramix, the honorable druid. With his golden knife he cuts his herbs, with which he prepares his famous magic potion.

And he knows many other secret recipe,,,




 

Explore our global analysis service for precise testing of your extracts and other substances.
 
ismokecrystals
#2 Posted : 12/19/2009 4:19:12 PM

DMT-Nexus member


Posts: 316
Joined: 13-Apr-2009
Last visit: 28-May-2012
 
panoramix
#3 Posted : 12/20/2009 2:11:54 AM

DMT-Nexus member


Posts: 162
Joined: 01-Dec-2009
Last visit: 09-Apr-2016
Location: TreeHouse
http://scientificsonline...313&bhcd2=1261275020

even sheaper than i first postet
Panoramix, the honorable druid. With his golden knife he cuts his herbs, with which he prepares his famous magic potion.

And he knows many other secret recipe,,,




 
69ron
#4 Posted : 12/21/2009 6:15:03 AM

DMT-Nexus member


Posts: 5826
Joined: 09-Jun-2008
Last visit: 08-Sep-2010
Location: USA
I have many different kinds of pH paper, and have gone through countless digital pH meters.

I've had the cheapest pH meters, the most expensive ones, and several in between. They are all very crappy. There is no such thing as a good pH meter. They all go bad pretty quickly and are plagued with problems. They need to be cleaned often, kept in storage solution when not in use, treated like a delicate flower, and they must be calibrated all the time. They are a pain in the ass.

If buying a pH meter, get the cheapest one you can get that has the accuracy you need. The more pricey ones are just as crappy, but can read more accurately while they are working. But they go bad just as fast as the cheapest ones you can get.

My advice is, if you don't need super accurate pH readings, get a very cheap pH meter. Like all pH meters, it's going to go bad. Don't waste money on a very pricey pH meter thinking it's not going to go bad. They all go bad. And it usually goes bad right when you need it working the most.

No matter what, you're going to want to have pH paper. They are much more convenient. For those times that you don't care if the pH is 3 or 4, pH papers are more handy. You can just grab them and use them. No cleaning, no calibration, no hassles. And best of all, pH papers are not electronic so they don't go bonkers on you right in the middle of testing, which every single digital pH meter does eventually.

For those times when you need to know if the pH is 8 or 8.5, you'll need a meter. There are pH papers that are supposed to read the difference between 0.5 increments, but they don't really do the job well. I've found many papers will read pH 8.5 as 9 or 8, or 8.5. It's often very hard to judge such an increment with pH paper. I have several kinds of paper with different resolutions and they all have this problem. They are not accurate, but they always work.

There are times when you absolutely can't use pH paper. One such case is when the fluid is too richly colored that it colors the paper making it impossible to judge the color of the paper.

So, bottom line, you're likely going to need both a meter and paper.

[edit: wow...so many typos I had to fix! Sorry about that]
You may remember me as 69Ron. I was suspended years ago for selling bunk products under false pretenses. I try to sneak back from time to time under different names, but unfortunately, the moderators of the DMT-Nexus are infinitely smarter than I am.

If you see me at the waterpark, please say hello. I'll be the delusional 50 something in the American flag Speedo, oiling up his monster guns while responding to imaginary requests for selfies from invisible teenage girls.
 
benzyme
#5 Posted : 12/21/2009 6:47:41 AM

analytical chemist

Moderator | Skills: Analytical equipment, Chemical master expertExtreme Chemical expert | Skills: Analytical equipment, Chemical master expertChemical expert | Skills: Analytical equipment, Chemical master expertSenior Member | Skills: Analytical equipment, Chemical master expert

Posts: 7463
Joined: 21-May-2008
Last visit: 09-Aug-2025
Location: the lab
the issue isn't the pH meter with the more expensive ones, it's the calomen electrodes that need special treatment
i.e. storage in AgCl sol'n

but those types are very accurate. thermo orion meters are industry standard

I have a 230A, got it on e.bay.
the electrode was busted, luckily my tech friend from the school gave me one
"Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
 
69ron
#6 Posted : 12/21/2009 9:29:22 AM

DMT-Nexus member


Posts: 5826
Joined: 09-Jun-2008
Last visit: 08-Sep-2010
Location: USA
Yes, it's usually the electrodes that go bad and not the main body. But the electrodes often cost more than a cheap meter costs, so you really need to ask yourself if you really need the extra accuracy or not. If you don't, just get a cheap one.
You may remember me as 69Ron. I was suspended years ago for selling bunk products under false pretenses. I try to sneak back from time to time under different names, but unfortunately, the moderators of the DMT-Nexus are infinitely smarter than I am.

If you see me at the waterpark, please say hello. I'll be the delusional 50 something in the American flag Speedo, oiling up his monster guns while responding to imaginary requests for selfies from invisible teenage girls.
 
benzyme
#7 Posted : 12/21/2009 6:04:14 PM

analytical chemist

Moderator | Skills: Analytical equipment, Chemical master expertExtreme Chemical expert | Skills: Analytical equipment, Chemical master expertChemical expert | Skills: Analytical equipment, Chemical master expertSenior Member | Skills: Analytical equipment, Chemical master expert

Posts: 7463
Joined: 21-May-2008
Last visit: 09-Aug-2025
Location: the lab
definitely

for all practical purposes, the Hanna pH Checker would suit the casual hobbyist. it's typically $30 or less
"Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
 
 
Users browsing this forum
Guest

DMT-Nexus theme created by The Traveler
This page was generated in 0.046 seconds.