• About Us

About Us

Leaders in Sensor Design & Manufacture

Chelsea Technologies, based in West Molesey, Surrey, has a broad base in environmental sensing technology spanning markets in fresh and waste water, oceanography, defence and a wide range of industrial applications.  In addition to its optical engineering capability, it provides underwater acoustic products to both civil and defence customers.  The company has enjoyed considerable expansion over recent years, fuelled to no small degree by its involvement in the rapidly developing, maritime/green shipping markets with World leading products such as FastBallast and Sea Sentry being used, respectively, for ship ballast water compliance testing and ship exhaust gas scrubber, wash water monitoring.

"For the last 53 years our customers have been using our high quality sensors and systems in a wide range of applications," said Dr Brian Phillips. "Submariners are using them to understand the environment they pass through, water authorities are using them to test water supplies. Scientists globally monitor changes in oceanic algae and the effects on climate change. Shipping companies have installed our state-of- the-art in-line sensors to monitor exhaust gas cleaning systems and assess the real time performance of ballast water treatment systems. Our highly sensitive hydrocarbon fluorometers are used in glider based systems to provide persistent, real time monitoring of hydrocarbon levels around drilling and production platforms. Demand for the Chelsea sensors and systems has also come from the process control, food and automobile industries."

In Oct 2018 Chelsea was taken over by Sonardyne International Ltd a UK based company specialising in subsea technology. Chelsea remains an independent business, as part of the Sonardyne group of companies.  

We'd love to hear from you, please contact Ellen Keegan, Tel: +44(0)20 8481 9000 to discuss your application.


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Contact Us:

55 Central Avenue
West Molesey

Tel: +44 (0)20 8481 9000
Fax: +44 (0)20 8941 9319

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