FastOcean takes FRRf to next level

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Although the Mk II FastTracka and optional FastAct laboratory system have become the de facto standard for in vitro and in situ applications of Fast Repetition Rate fluorometry (FRRf), the new FastOcean raises the bar significantly higher. Whilst maintaining all of the functionality of the Mk II FastTracka, these 3rd generation FRRf sensors add the following:

  • New analytical methods and Graphic User Interface: for real-time estimation & presentation of  Gross Primary Productivity (GPP) parameters, without the requirement for  secondary techniques
  • Automated synchronisation of ambient plus dark sensors and complete profiling systems:
    for  in vivo GPP studies  
  • Extended functionality when used with the FastAct laboratory system: for invitro GPP studies
  • Three excitation wavelengths: for GPP, phytoplankton group identification & bloom detection
  • Major improvements to dynamic range and signal to noise: extends the range of in vivo applications

More information

  FASTocean shown in profiling mode.
      linkedinJoin the FastOcean Users' Group

Current applications for the FRRf sensors includes:

  • Fish survival assessment studies by the University of British Columbia
  • Coastal monitoring by the Royal Netherlands Institute for Sea Research
  • Iron fertilization experiments by the National Institute of Oceanology (India)
  • Algal bloom monitoring by the University of Copenhagen and Aarhus University
  • Water contamination detection by the Washington Suburban Sanitary Commission
  • Laboratory culture monitoring by the NOCS & University of Essex

A new approach to the analysis of FRR data

A manuscript describing a new approach to the analysis of FRR data in studies of primary productivity (Oxborough et al.) has just been published in Limnology and Oceanography: Methods. The new algorithms described are fully integrated within the FasPro8 GUI,  which allows for real-time analysis of data from Chelsea's FastOcean FRR sensors.


Monitoring the growth of algal production

Algae may hold the greatest potential for tackling the problems of our worldwide dependence on fossil fuels while simultaneously limiting CO2 emissions linked to global climate change. The race is now on to produce algae on a large scale to supply raw materials for the pharmaceutical, chemical and biofuel industries.   “We are currently in advanced talks with a number of producers and scientists around the world to apply our unique FRRf technology to online monitoring of algal growth and health in bioreactors and open ponds,” said Dr John Attridge, Chelsea’s Technical Director. More information.   Monitoring the growth of algal production 

Hydrocarbon detection - Monitoring the ship wreck Costa Concordia


“There has been unprecedented demand for our hydrocarbon detection sensors following the oil spill in the Gulf of Mexico,” said Bruce Kimber, Chelsea’s Customer Services Manager, “and more recently we’ve been contacted to supply the UviLux hydrocarbon sensor to monitor potential spillage during the procedure of off-loading the ship’s fuel from the stricken vessel Costa Concordia in Italy.”  Chelsea’s hydrocarbon detection sensors are optimised to monitor both crude and refined oil from coastal margins to deep ocean. They are  extremely sensitive, give instant results, are portable and very easy to use. Learn more about our range of sensors for hydrocarbon detection.

  Hydrocarbon detection by Chelsea Technologies - ship wreck Costa Concordia

Strong response to new Sub-Sea Pipeline Leak Detection System


Chelsea announced this week a significant increase in both sale and rental contracts for the 2011 Model Sub-Sea Pipeline Leak Detection System. The PLD system now includes the provision of digital output on all fluorometers  operating these systems, and alignment of power requirements allowing easy integration to common ROV platforms. Systems are now on offer for both shallow (ROV mounted and diver held) and full ocean depth operations.  “Over the last 6 months, we’ve received contracts, for both hire and purchase of these systems, from Total, Haliburton, Acergy France, CSA International, Shell, Weatherford US, Subsea 7 and BJ Services,” said Justin Dunning, Chelsea’s Sales Manager.  Learn more about the systems these clients have been buying.

  Sub-Sea Pipeline Leak Detection System

Novel approach to sewage & slurry outflow monitoring

“The Chelsea UviLux Effluent Monitor enables in situ real-time reporting of levels of sewage and Biological Oxygen Demand (BOD) within both natural water systems and water processing plants,” said Justin Dunning, Chelsea’s Sales Manager.  By use of UV fluorescence, the UviLux Effluent 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.  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.   Noval approach to sewage & slurry outflow monitoring

Water quality monitors for ship exhaust gas cleaning systems

Water quality monitors for ship exhaust gas cleaning systems  

To comply with International Maritime Organization (IMO) environmental regulations, global shipping is required to meet specific exhaust gas emission levels. These will become even more stringent in the next few years.

Chelsea is supplying sensor systems as an integral part of exhaust gas cleaning systems to continuously monitor their performance. We have systems installed in both new ship builds and retrofit systems.

Each system consists of sensor cabinets monitoring the seawater intake and discharge enabling comparison data to confirm the exhaust cleaning systems operate within acceptable emissions limits.

  Each cabinet monitors polyaromatic hydrocarbon levels, turbidity, temperature and pH and incorporates a flow switch. Data from the sensors is relayed to a main control system via an Ethernet connection. Chelsea's low cost UviLux hydrocarbon sensor has been re-configured for the specific requirements for both the PAH and turbidity measurements. "This work expands our existing capability in the supply of in-line monitoring systems to the maritime sector,” said Richard Burt, Chelsea’s Marketing Director. “This is a natural extension to our business supplying FerryBox environmental systems for commercial vessels and ships of opportunity.”

Ballast water monitoring systems


The introduction of invasive marine species into new environments by ships’ ballast water has been identified as one of the major threats to the world’s oceans. Annually shipping moves over 80% of the world’s freight whilst globally transferring up to 5 billion tonnes of ballast water. A similar volume may also be transferred domestically within countries and regions each year. Ballast water is essential to the safe and efficient operation of modern shipping, providing balance and stability to un-laden ships. However, it poses a serious ecological, economic and health threat. When the 2004 International Maritime Organisation (IMO) Ballast Water Convention comes into force, it is estimated that 68,000 vessels will require functional certified Ballast Water Treatment Systems.

“We are currently working with a number of companies who manufacture treatment systems, and certification authorities who are formulating the testing criteria, to provide them with suitable sensor technologies to test for gross non-compliance,” said Richard Burt, Chelsea’s Marketing Director, “ensuring the discharged ballast water meets IMO standards is extremely important to remove the risk from the transfer of invasive species”. 

  Ballast water monitoring systems 

Chelsea supports YachtGOOS initiative


Chelsea Technologies is delighted to support the Yacht Global Ocean Observing System initiative. The aim of this round-the-world sailing expedition is to monitor the status of Earth's oceans, aboard a converted recreational yacht.

“Chelsea’s MiniPack sensor is being used to measure  salinity, temperature and fluoresence,” said Chelsea’s Justin Dunning, “and data is currently being transmitted back to the National Oceanographic Centre, Southampton to be analysed.” Learn more.

  YachtGOOS initiative

Military acoustic sonar systems


Chelsea continues to provide the international marine defence market with unique acoustic sensors and systems. “We have recently secured supply to the Agency for Defence Development of South Korea, with assistance of in-country agents Tae Kwang Electronics Corporation, for the Dualsense 012 low frequency projector for submarine fit,” said Justin Dunning, Chelsea’s Sales Manager. “These transducers are capable of detecting and transmitting at frequencies as low as 10Hz and 10kHz respectively, at very high sensitivities.  Originally developed as part of the Versatile Acoustic Source System (VASS), the Dualsense 012 is just one from our range of high performance transducers available for military applications.”

  Military acoustic sonar systems

Acoustic transducer success in Scandinavia 

“After an incredibly busy year within the acoustics sector of the company, we’re delighted to report a steep increase in sales for standard hydrophones and projectors over the last 12 months, increasing turnover in the sector by over 100%,” said Justin Dunning, Chelsea’s Sales manager. This growth in sales was achieved internationally, with a significant proportion obtained from Norway and Sweden. Of notable popularity was the Sonoflex range of low cost, low frequency flexural disk transducers. Chelsea’s acoustic transducers covered a wide range of applications from environmental monitoring to harbour security applications. We look forward to another busy year.   Acoustic transducer success in Scandinavia

Hydrophones for nuclear facility monitoring

Leading radiation detection company, Mirion Technologies, has recently purchased a number of Chelsea Hydrosense hydrophones for monitoring of machine noise within nuclear facilities. These hydrophones will be integrated into a Mirion Technologies’ system which will also include cameras and microphones for nuclear facility monitoring. The specific Hydrosense model chosen gives the required sensitivity within a small self-contained package and provides an easy interface for system integration. The Hydrosense range of hydrophones from Chelsea all include integral pre-amplifiers, providing excellent receive sensitivity across a wide frequency band, with low noise performance. To learn more about our range of hydrophones please click .
   Hydrophones for nuclear facility monitoring

Sonotubes remain the communications transducer of choice for sub-surface navigation

A major supplier in communications and positioning technology based in Aberdeen continues to choose the Chelsea communications transducer, Sonotube HP for use in their navigational network system. The Sonotubes are operational in both transmit and receive modes, and are particularly useful for communication applications. The unique design of this transducer enables the uncompromising sensitivity and power achieved. Chelsea provides both a bulkhead mounted version and dunking version (included moulded cable) of this popular, low frequency, broadband communications transducer. To learn more about the Sonotubes range of transducers please click.   Sonotubes remain the communications transducer of choice for sub-surface navigation

Oceanographic sensors for Astute class submarines

Chelsea is the design authority for the Sonar 2115 oceanographic sensor system fitted to the Astute Class submarines. Under a team headed by Bruce Kimber we also provide post design  services in support of the Trafalgar Class Sonar 2081 submarine oceanographic sensor suite. Over the last year Bruce has arranged the service and calibration of  over 26 systems.  To learn more about our sensors for defence applications please click.   Oceanographic sensors for Astute class submarines

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