Silica, or silicon dioxide, is one of the most abundant materials on earth and is regularly found in water. In drinking water or wastewater, it is rarely a concern due to the low concentrations in which it is found but in some industrial applications such as in power stations its presence is a real issue.


Poor steam quality in power generation is often caused by silica, resulting in a build up of deposits on the turbines. This can reduce efficiency or have even worse effects.

Silica is measured via colorimetry using ammonium molybdate chemistry and with a long path length, very low levels of silica can be measured.

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Products for this application


An industrial colorimeter for the measurement of silica in power generation applications

Online Colorimetric Analyser


A compact silica colorimeter for industrial applications


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Established in 1971 PMA is a well-recognised provider of online instrumentation for process control and compliance monitoring. With expertise in analytical techniques such as Photometry, Colorimetry, Ion-selective electrodes (ISEs), Titration, Fluorescence, Ultrasonics and more.

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