Pure Water pH Probe | pHure Sensor
pH Probe for Pure and Ultrapure Waters

pH Probe for Pure and Ultrapure Waters

Pure water pH and ORP measurement in low to very low conductivity waters

pH/ORP Frequently Asked Questions

How often should I calibrate my pH sensor? The calibration interval needed for pH is highly application-dependent. The more uniform process conditi...

How often should I calibrate my pH sensor?

The calibration interval needed for pH is highly application-dependent. The more uniform process conditions are (temperature, pressure, composition, freedom from coating, etc.), the more stable a pH sensor will be and the longer the calibration interval may be. Most pH installations calibrate between once a week and once a month but shorter or longer intervals may be appropriate based on experience. It is a good practice to begin by calibrating frequently and then gradually go to longer intervals, as stability in the installation and accuracy requirements allow.

What is the shelf life of pH and ORP (redox) sensors?

If a pH or ORP sensor is stored at normal room temperature with its original storage cap and solution in place on the end of the electrode, it can last well over a year with no degradation in performance. If the storage solution is allowed to dry or leaks out due to storage at high temperatures, freezing or other causes, the life may be reduced significantly.



Less pH Error With Liquid Flowing Electrolyte
Easy Maintenance Without Particle Accumulation
Plug and Measure with Intelligent Sensor Management

Products and Specs

Find pH probes and meters for reliable measurement in pure waters

Products and Specs
Set filter
Clear All
Short description
See details
Short descriptionFor pH measurement in very low-conductivity waters.
See details
Short descriptionFor pH/ORP measurement in low to medium- conductivity waters.


Learn more about our pH probes and meters for reliable measurement in pure waters

Case Studies

Contamination in Power Plants
This case study explains how EPS, Serbia's state-owned power company, was planning a five-year upgrade of the water chemistry analytics equipment of t...
Pure water fabricator
This case study explains how an Indian pure water fabricator was faced with challenges during a power plant expansion project to meet the plant's qual...
Pure Water Analytics
This case study explains how Veolia Water Technologies was granted the building services contract for the National Graphene Institute and so turned to...


pH measurement application note
This application note explains how power plants can reduce the risk of corrosion through pH control of their water treatment.
ORP Measurement in Pure Water
ORP is also used in other process and wastewater applications, including monitoring reducing conditions in power plant cycle chemistry, covered later...
Calculation of pH and Carbon Dioxide from Power Plant Conductivity Measurements
This application note explains about calculation of pH and carbon dioxide from power plant conductivity measurements.
pH Measurement In Low Conductivity Samples
Power plant cycle chemistry guidelines and standards specify narrow ranges of pH to minimize corrosion of highly valuable components. In addition, mak...

Extended Product Information

General Questions about Thornton Products
Thornton is the leader in pure and ultrapure industrial water monitoring instrumentation used in semiconductor, microelectronics, power generation, ph...


800 352 8763
Maintenance & Optimization
Calibration & Quality
Training & Consulting
Thank you for visiting www.mt.com. We have tried to optimize your experience while on the site, but we noticed that you are using an older version of a web browser. We would like to let you know that some features on the site may not be available or may not work as nicely as they would on a newer browser version. If you would like to take full advantage of the site, please update your web browser to help improve your experience while browsing www.mt.com.