Home

Get seen by the people who use your products!
THIS SPACE
can be yours

pH Measurement

The following technical papers are from our valued sponsor Emerson Process Management.
Theory and Practice of pH Measurement- An excellent 43 page handbook.
Advances in pH Modeling and Control - Gregory K. McMillan (Emerson) and Mark S. Sowell (Solutia Inc) - Many chemical and biological processes have pH control loops. Good pH control can be important for product quality as well as environmental compliance. The extraordinary rangeability and sensitivity of pH as a concentration measurement poses exceptional challenges in many aspects of pH design and implementation.
Virtual Control of Real PH - Virtual Design reduces the hassles of PH control - from our valued sponsor Emerson
Bringing pH measurement systems up to date - George Pence and Richard Baril - Improvements in sensor life and range of applications can move liquid analysis from one of the most “cursed” functions in the plant, to one that requires only modest attention - thanks to ISA and InTech

Other General Links.
pH Measurement - Some super information thanks to Cole Palmer
Typical Problems in Industrial pH Measurement & Control -Tips and solutions to Industrial pH problems from EUTECH Instruments
The Easy Guide to pH Measurement - Thanks to ABB Automation
pH Theory and Practice- You have to register to get this handbook from Radiometer Analytical
pH Measurement Basics- From Kittiwake.com

The following articles are compliments of Digital Analysis Corporation
pH Probe Architecture. A description of how a pH electrode functions. Sample calibration procedures are also included in this discussion.
pH Probe Calibrations. Fundamental procedure for cleaning and calibrating the most common pH electrodes used in industry today which are also the most common probes that we use on our systems.
pH Adjustment, a primer. A review of the meaning of pH, covering the pH scale, acids and bases, acidity and alkalinity, and the definition of pH. Also covered are the two basic system designs used in industry Continuous Batch (Flow Through) and Batch pH adjustment systems. Also discussed, but only briefly, is a proprietary design known as "Optimized Batch" pH adjustment / neutralization systems.
Limestone for pH Adjustment. This article clears up many misgivings regarding the use of limestone of for pH Adjustment. So you are thinking about using limestone? Better read this article first.
Chemicals used for pH Adjustment. The various choices for acid and base neutralizing chemicals are discussed here. If you are wondering which acid or base you should use as a neutralization agent then this discussion may be of help.

pH Maintenance
pH Probe Maintenance from the Digital Analysis Corporation
Care of pH, ORP, and pH/ORP combination sensors- Tony Arnerich- In-Situ Inc.

Probe Cleaning - A common issue with pH meters is contamination and fouling of the probe, the following links provide some good information on cleaners available, including ultrasonic, bushing, chemical and self cleaning methods.
http://www.analyticon.com/analyticon/products/process/images/sensor_cleaning.pdf http://www.analyticon.com/analyticon/products/process/pH_cleaningdevices_immersionhc7.htm http://www.pryde.com.au/POLY_pH-ORP_Probes.html http://www.wq.hii.horiba.com/pdf/k8.pdf http://www.endress.com/eh/home.nsf/?Open&DirectURL=4E3EC3004B14A5F5C1256D4A002C6B7B

Other Accessories

Redundant probes
http://www.phneutralizing.com/products/redundant_probe.htm

Heavy Duty Self cleaning probes
http://www.elscolab.be/pdf/Chemical_e.pdf