PH measurement
Our pH products are specially designed to provide accurate and reliable measurements of the acidity of liquids. Using sensors and analysers from industry-leading manufacturers, we can offer solutions to suit a wide range of applications, including water treatment, the food industry and chemical production. With our products, you can quickly detect changes in your processes and take action to ensure optimal performance and the highest quality end product.
More information
What does pH measurement mean?
pH indicates the concentration of oxonium ions [H₃O⁺] in a solution according to pH = -log [H₃O⁺]. A pH meter shows this indirectly by measuring the voltage that occurs between a glass electrode (sensitive to hydrogen ions) and a reference electrode. The voltage is converted (according to the Nernst equation) into pH value.
How industrial pH measurement works
- Glass or ISFET electrode generates a voltage which, according to the Nernst equation, corresponds to the hydrogen ion concentration.
- Reference electrode creates stable comparison potential; poisoning of the reference is a common source of error.
- Temperature compensation is mandatory - even a 0.1 °C error can cause a 0.01 pH unit deviation.
- Operational challenges: coating, pressure variations, chemical attack, CIP cycles and steam flushing. Correct sensor selection and predictive diagnostics reduce downtime and manual calibration.
