From chlorine analysers to suspended solids monitors, in the last 25 years Pi has developed some of the best water quality analysers and sensors that are available to buy. For example, Pi’s suspended solids monitor SoliSense®, turbidity meter TurbSense® and DAF coagulation controller and dosing system DAFSense®.

Process Instruments 25th party

Since 1998, Pi has become a global distributor of water analysis instrumentation and has won not one, but two Queen’s Awards for Enterprise, one for Innovation, and one for International Trade.

So far, Pi has reached customers in over 60 countries, across 6 continents, won multiple awards, and had some of its methods and products patented. If that is what Pi has achieved in the past 25 years, it is exciting to think of what can be achieved in the next 25! With new products on the horizon, be sure to look out for what Pi has coming next. There is an exciting future ahead for Process Instruments.

To celebrate Pi turning a quarter of a century a celebratory party was held, in Todmorden Town Hall, which was originally built astride the border of Lancashire and Yorkshire to symbolise unity. It was an evening filled with memories, happiness, and laughter, and it was certainly a celebration to remember.

Here’s to the next 25 years!

If you would like to learn more about Pi and its products, please visit

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