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A team of engineers and scientists are engaged in the design and manufacture of a range of sensors and systems for the marine, environmental, defence, homeland security, industrial process control and life science markets.
For nearly 50 years, customers have been using our high quality sensors and systems in a wide range of applications - submariners are using them to understand the environment they pass through, water authorities are using them to test water supplies to guard against chemical attack by terrorists. Scientists are using our sensors to monitor oceanic algae to tackle climate change and shipping companies have installed state of the art in-line sensors to monitor their exhaust gas cleaning systems and ballast water in order to prevent contamination of seas. Oil companies are using our sensors to detect subsea pipeline leaks and monitor oil spills. Demand for the Chelsea sensors and systems has also come from the food and automobile industries.

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AquaTracka - III - FluorometerAQUAtracka III is a compact, lightweight, submersible fluorimeter for the detection of chlorophyll a, dye tracing or turbidity. Manufactured in titanium, it is rated to 6000m. For deck and laboratory applications a flow through cowling is available. |
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UviLux - Digital FluorometersThe UviLux is an innovative, sensitive, low cost, digital in-situ UV fluorometer that offers the user significantly increased functionality when compared to existing UV fluorometers. Variants of the UviLux provide real time monitoring of the concentration of refined & crude hydrocarbons, Coloured Dissolved Organic Matter and Tryptophan, a surrogate marker for Biological Oxygen Demand and bacterial contamination in waste, recycled and natural water ... |

Water Contamination Detection - Water & WastewaterSecurity of water assets is becoming an increasingly major issue that demands immediate and robust alarms for potential contamination. In addition to this, natural growth of algae is a common problem for water asset managers, the results of which can increase maintenance costs of water processing plants as well as directly effecting water taste. The CTG FastGuard fast repetition rate fluorometer analyses information on the physiological state of the algae it monitors within an in-line flow system. A number of key parameters are monitored and analysed by the on-board embedded software, which instantly initiates both an audible and visual alarm on detection of a contaminant within the water system. The FastGuard is a robust low maintenance system which avoids false positives often provided by other contamination detection systems. » Read more » Contact now / Request quote |
Monitoring of Algal Production / Monitoring of Algae Growth - Monitoring & TestingOver the past 20 years active fluorescence has been widely adopted by the scientific community, ecosystem managers and crop growers as a rapid and non-invasive method of estimating photosynthetic performance within a wide range of organisms, including phytoplankton (microalgae and cyanobacteria), biofilms, benthic autotrophs (corals, macroalgae and sea grasses) and terrestrial plants. The main rational for applying active fluorescence is that changes in key fluorescence parameters can reveal the early onset of chronic and acute degradation of photosynthetic performance and subsequent growth, e.g. resulting from nutrient deficiency or the presence on one or more toxicants. Over the past 15 years we have been developing an active fluorescence technique called Fast Repetition Rate (FRR) fluorometry to monitor algae populations in the open-ocean, primarily to support climate and ocean modelling. » Read more » Contact now / Request quote |

