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  • Do you need sensors for sewage and slurry outflow monitoring?

    The CTG UviLux Effluent fluorimeter enables in-situ real-time reporting of levels of sewage and BOD within both natural water systems and water processing plants. By use of UV fluorescence, the UviLux Sewage Monitor detects protein which is inherent within sewage and slurry and provides a means of assessing concentrations of sewage and slurry in solution with unparalleled accuracy and resolution. The principle behind the measurement is based on fluorescence excitation of Tryptophan-like fluorescence, within the UV wavelength band. Use of such fluorescence provides signal detection far superior to absorption methods currently in use. Studies have shown that use of such fluorescence provides robust and repeatable measurements of sewage and slurry solutions, and correlates with both BOD and Bacterial Contamination.
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PRODUCT LAUNCH: CTG launch their new Non-Contact Algae System, the “ALGAE-Station NC” at WEFTEC 2017

non contact triluxThe new Algae-Station Non-Contact system from leading water quality sensor designer Chelsea Technologies Group (CTG) will be launched at WEFTEC 2017, Chicago on 2-4 October 2017.

The Algae-Station NC provides water process control operators with a unique monitoring system which reduces cleaning and maintenance requirements that are commonly associated with in situ sensors, reducing significantly Cost of Ownership of these type of sensors. These non-contact systems, up till now only available for such parameters as turbidity and flow, are now, with the Algae-Station NC, available for algae monitoring in water processing plants.

The Algae-Station NC system consists of a CTG UniLux Chl-a fluorometer (or CTG TriLux fluorometer for multi-pigment measurements (Chl-a, Phycocyanin & Phycoerythin)), a specially designed Weir Style flow manifold which aligns the UniLux / TriLux to a flat water surface and a Watchkeeper logging and display unit. The system can also be adapted for users with existing ‘trough’ style multi-parameter monitoring systems.

For more information, please contact

Justin Dunning, Sales Manager CTG, Tel 07773 849526
CTG Media contact:  Ellen Keegan , Tel: +44(0)20 8481 9019.



WEFTEC 2017: CTG call to expand its global network of agents & partners

Full story

Chelsea Technologies Group (CTG) specialises in the design and manufacture of a range of sensors & systems for the maritime, marine science, water environmental, defence and process control markets. “For over 50 years we have been operating globally via a network of overseas agents and partners,” said CTG’s Sales Manager, Justin Dunning. “We are now actively seeking new overseas representatives who specialise in any of our business sectors”.

Based in Surrey, England, CTG specialises in the design of optical, acoustic and physical sensors measuring algae, bacteria, hydrocarbons and water clarity.

“Our customers are using our high quality sensors and systems in a wide range of applications,” said Justin Dunning. “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 CTG sensors and systems has also come from the process control, food and automobile industries.”

For more information, please visit Booth No 7954 at WEFTEC or contact Justin Dunning, Tel 07773 849526.

SWIG Announcement – CTG’s Sensor Solutions for Water Utility & Environmental Monitoring Sectors on Display

BACTI Station

BACTI-Station & Pro – Provide real-time, highly sensitive measurements for assessing bacteria levels

Sensing in Water 2017, 27-28 September 2017, Nottingham Belfry
Chelsea Technologies Group (CTG) will be exhibiting and presenting at the Sensing in Water Conference, 27-28 September 2017, Nottingham Belfry. The topic of the conference is “Meaningful measurement from the micro to the macro scale”. Presentations will range from the micro (sensor design), to process control, to network monitoring, up to the use of monitoring at the catchment scale including clean water, wastewater and environmental applications.

On display will be CTG’s range of high performance LUX sensor solutions ideally suited to the water utility and environmental monitoring sectors. Monitoring parameters include: Algae, Dye tracing, CDOM (Organics), Bacteria, BOD, Hydrocarbons, Turbidity.

Both portable and on-line sensor systems are offered, all based on fluorescence technology providing high sensitivity and selectivity. These LUX range of sensors can also be easily connected to existing systems. CTG sensors provide benefits in areas such as filter monitoring and management, disinfection by-product formation potential, coagulation control, bacteria and organic loading, taste and odour, hydrocarbon contamination of water sources and efficacy of bacterial removal systems. For more information contact Justin Dunning Tel: +44(0)20 8481 9000.

Contact us:

Media contact: For more information / high resolution image, please contact  Ellen Keegan, Tel: +44(0) 208 481 9019.

Chelsea Technologies Group wins contract to supply over 90 TriLux Fluorometers to Sweden

WEFTEC 2017  – Visit us on Booth 7954

TRILUX in Circle drop from datasheet.pngLeading water quality sensor manufacturer, Chelsea Technologies Group (CTG) has just been awarded a contract to supply over 90 CTG TriLux fluorometers for use on a Swedish pioneering programme to develop standardised infrastructures for understanding mesocosm experiments in lakes.

These TriLux fluorometers are all configured to measure Chlorophyll a, Phycocyanin Algae Pigment and Turbidity, to inform on how planned experiments will affect the Algae within lakes.  The fluorometers will provide data in SDI-12 format for onward transmission.  A set of approximately 20 TriLuxes are destined for five different research stations.

The CTG TriLux is a low cost, miniaturised multi-parameter digital fluorometer capable of real-time monitoring of three different parameters in a single probe (combinations of Chlorophyll a, Phycoerythrin, Phycocyanin and Turbidity).  They have to date been used in a wide range of applications including monitoring freshwater, marine and coastal waters plus process control applications.



About Chelsea Technologies Group (CTG)

CTG is exhibiting at WEFTEC 2017, Chicago (2- 4 October 2017) in the UK Pavilion with the UK Department for International Trade (DIT) and British Water (Booth No 7954).   On display will be CTG’s range of on-line & portable water quality monitoring systems.

Chelsea Technologies Group (CTG) specialises in the design and manufacture of a range of sensors & systems for the maritime, marine science, water environmental, defence and process control markets. With over 50 years’ experience, CTG specialises in optical, acoustic and physical sensors measuring temperature, conductivity, hydrocarbons, fluorescence and water clarity.   For more information, please visit https://www.chelsea.co.uk

Contact us:

WEFTEC Booth 7954:  Justin Dunning, Sales Manager CTG, Tel 07773 849526 jdunning@chelsea.co.uk

CTG Media contact:  Ellen Keegan ekeegan@chelsea.co.uk, Tel: +44(0)20 8481 9019.

Finnish Environment Institute takes delivery of a CTG ALGAE-Wader Pro system, as part of the ‘Far Out! – Pupils as Environmental Scientists’ Programme

“The Finnish Environment Institute SYKE, has taken delivery of a CTG ALGAE-Wader Pro system, as part of the programme “Far Out! – Pupils as Environmental Scientists”,” said Jari Silander, Senior Researcher at SYKE.

The CTG ALGAE-Wader Pro system, which is an easy to use portable in situ  algae monitor providing data on Chlorophyll a and other algae based pigments, is being used to augment current practices of taking samples for laboratory analysis.  All data from the CTG TriLux sensor provided with the system is clearly displayed in real time on the Hawk hand held unit and recorded.  The Hawk records both the time and position of the data via an in-built GPS.  A RAG (Red, Amber, Green) alarm system can be set up to clearly indicate algae levels of concern.

The Far Out! Project aims to develop multidisciplinary learning models via environmental research projects in which pupils use different technological instruments and measurements as part of the research processes. Schools in several Finnish municipalities arrange outdoor training sessions which include elements of gamification and provide pupils with monitoring equipment obtained under the program. Training includes theory covering quality control and certification of the measurements and the use, calibration and maintenance of equipment.

The Far Out! Project has been set up as part of the MONITOR 2020 National Environmental Monitoring Strategy Program, which defines strategic targets for the gathering, storage and utilization of environmental data. This program, which is also linked to the European Citizen Science Association (ECSA), aims to achieve higher quality and maximise cost efficiency throughout the production process of monitoring and to provide easier utilization of information.

algae monitoring

Students carrying out assignments, August 2017 (Rauma in Pölläkari Finland)

Where can you see the ALGAE-Wader Pro system? It will be on display at the Sensing in Water Conference in Nottingham (27-28 September) and at WEFTEC 2017 (2-4 October) in Chicago. Justin Dunning and his team will be at hand to give you all the information you need. Please get in touch if you’d like to set up a meeting.

WEFTEC Booth 7954:  Justin Dunning, Sales Manager CTG, Tel 07773 849526 jdunning@chelsea.co.uk

CTG Media contact:  Ellen Keegan ekeegan@chelsea.co.uk, Tel: +44(0) 208 481 9019.    

Far Out! Project Contact: Jari Silander, Senior Researcher (MONITOR 2020 programme), Finnish Environment Institute,  Jari.Silander@ymparisto.fi   Tel: +358 295 251 638



CTG launch V-Lux, their new multi-parameter fluorometer at WEFTEC, Chicago

Loren VLux.jpgChelsea Technologies Group (UK) are pleased to announce the launch of their new multi-parameter fluorometer, the ‘V-Lux’, to the water and environmental sector at WEFTEC 2017 in Chicago 2 – 4 October 2107 (Booth 7954).

This highly sensitive innovative multi-parameter fluorometer provides robust data for monitoring Algae, Bacteria or Hydrocarbons, and uniquely operates in demanding highly turbid and coloured environments providing previously unattainable ranges from in situ fluorescence technology. By adopting unique fluorescence channel referencing techniques, the V-Lux detects contributions from each of its 3 fluorometric channels (4 for Algae variant) and reports optimised selectivity for each of the fluorescent channels provided.

Chelsea Technologies Group (CTG) are a leading design and manufacturer of sensors & systems for the maritime, marine science, water environmental, defence and process control markets. With over 50 years’ experience, CTG specialises in optical, acoustic and physical sensors measuring algae, bacteria, hydrocarbons and water clarity.

For more information please visit our website or contact us.


Actively seeking new overseas agents with experience of either Maritime, Water Environmental, Marine Science or the Defence markets to join our global network.


For over 50 years, Chelsea Technologies Group has been operating globally through a network of experienced overseas agents. We now wish to extend this group and are actively seeking new overseas representatives who specialize in any of the following market sectors: Maritime, Marine science, Water Environmental or Defence markets. Please send details of your market knowledge and experience to: Justin Dunning jdunning@chelsea.co.uk.