About Us

Process Instruments (UK) Ltd. (Pi) is a global supplier, providing water analyzer instrument solutions since 1998. With offices, a laboratory and new manufacturing facilities in Burnley (UK), with subsidiaries in Ireland and France and a company representative in China, Pi has a growing reputation for innovation with customers in over 50 countries, across 6 continents.


Service & Support

We have vast service experience, and working knowledge of many different types of on-line and safety monitoring equipment so it doesn’t have to be our equipment for us to service it! We offer service call-outs, instrument calibration, service contracts and full maintenance contracts on a whole host of process monitors and analyzers, and on-site warranty support.


Private Labels

Pi makes some of the best Residual Chlorine Analyzers in the world. So good in fact, that other companies want to sell them as their own, saving them huge sums of money on Research & Development!



Download technical materials here: Brochures, Articles and Technical Notes available.


Contact Us

Contact details for your local office are available here.

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