Your online guide to
pH measurement

The objective of this site is to explain everything you need to know about pH measurement.

I had the pleasure in my previous job to give courses in this area of measurement techniques. It was fun and I met many nice people. One thing I found out was that most people appreciate a simple and a less scientific approach, regardless of level of education. My hope is that I have succeeded to include this insight when I built this site.

Why measure pH?

• It is a critical measurement in industries ranging from chemical processing, pulp and paper, food and beverage and biotechnology.
• To test a chemical against a specification. To ensure product quality.
• To test a sample against a legal requirement.
• It is of outstanding importance in water and environmental analysis.
• Prevent damage to materials and humans.
and more. . . . .

At this site you will, among others, learn to:

- understand the theory behind the measurement.
- understand the function of the sensor and meter.
- pick the right sensor.
- handle and maintain your sensor.
- calibrate and understand why calibration is needed.
- make proper measurements.
- recognize and avoid common problems.

Share your point of view with others!

Don't forget to check the "Forum" section. You maybe have a question, or maybe you have an answer!?

The main sections of this site:

The All-about-pH Blog
This page keeps you up-to-date with all additions and changes to the Web site. Subscribe here.
pH Definition
pH definition - or what is pH? Read more . . .
The basic concept of acids and bases
When dealing with pH testing you need to have an understanding of the basic concept of acids and bases. Read here . .
The pH scale
The pH values of different aqueous solutions can be arranged in a pH scale.
pH color chart
Learn how to use pH color chart . . .
The pH sensor
Learn how the pH sensor works:
pH Electrode
To pick the appropriate pH electrode for your application you need to have a basic understanding of the different parts of an electrode, learn more:
pH probe
Learn how to choose the appropriate pH probe for your application; . . .
pH meter
Learn how a pH meter works; . . .
pH calibration
Learn why regular pH calibration is needed to ensure accuracy. . .
pH Testing
Consider the following points before you start your pH testing: . . .
Online pH measurement
Learn more about online pH measurement: . . .
The pH measurement forum
The pH measurement forum provides opportunities for the informal exchange of opinions, experiences and comments on different aspects of pH testing and measurement.
Search the site
Privacy Notice
Privacy policy of this website.
Contact form
Contact form

Favorite pages:

acids and bases
What is an acid? What is a base? If you want to know, read here!

calculating ph
Do you know what pH stand for? If not, click here!

electrode design
The pH electrode consists of the following parts:
. . read here!
offset error
Real-world pH electrodes are not ideal,
read why.

definition of ph
What is the definition of pH? See the answer. . .

nonglass ph electrode
Is it not possible to use a glass electrode for your application? Use a non-glass pH electrode.

ph measurement
Learn how the temperature affects your pH measurement.

Feedback from readers:

This site is really helpful, thanks for posting this. I really like how each topic is linked at the end to another page.

I have started working at a water treatment plant (lots of probes of different kinds) and have a science background, but did not learn this in huge detail at uni unfortunately. Very helpful to know! Thanks!

BR Jaymie
_ _ _ _ _ _ _ _ _ _ _

This site helped me a lot for my science project. It is very useful and it gives you a lot of information in a clear and understandable way!