CTG & Sea Sentry Stephanie Lavelle Maritime Manager Chelsea - - PowerPoint PPT Presentation

CTG & Sea Sentry

Stephanie Lavelle Maritime Manager Chelsea Technologies Group

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Chelsea Technologies Group

Application of sensor technology Process control & monitoring Medical diagnostics Agribusiness Fresh water & coastal monitoring Offshore pipeline leak detection Water quality monitoring NAD Tactical

• ceanography

Acoustic target simulation Oceanographic research Sensors & systems Acoustic transducers Fisheries Exhaust gas monitoring Ballast water monitoring FerryBox Water quality/Treatment Bio/chem Security Environmental

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CTG fluorometer products

• Visible
• Algae
• Dye tracing
• UV
• BTEX
• Polycyclic Aromatic Hydrocarbons
• Tryptophan
• CDOM
• Optical Brighteners
• Active
• Photosynthesis
• Algal health
• Ballast water monitoring

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Sea Sentry - integrated cabinet solution

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Sea Sentry features

• Sensors
• Digital pH probes (pre-calibrated)
• Turbidity sensor, ISO 7027:1999(E) compliant
• Extended range PAHphe eq sensor
• Turbidity, ‘colour’ and temperature correction
• Integrated sensor validation/calibration protocols
• Solid standards for optical sensor validation
• System
• Integrated pump & de-bubbler
• Pneumatic anti-fouling protection
• Single board interface electronics
• Touchscreen Graphical User Interface

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Fluidics

pH sensor controller pneumatic solenoid valves pneumatic regulator de-aerator pressure gauge pump

• utlet

isolation valve pressure relief valve flow meter turbidity sensor inlet isolation valve PAHphe eq sensor pH sensor mount strainer drain valve

De-bubbler design

Aerated Water

Outlet

Low Pressure Bleed Sensors De-aerator

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• Single interface PCB
• All wiring on removable connectors
• Easy field replacement
• Digital interfaces
• MODBUS via Ethernet
• Dual redundancy
• USB 2.0 for data download
• Analogue interfaces
• Optional 5 off 4-20 mA

Electronics - enclosure

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Integrated fluorometer & transmissometer

Fluorometer

• Range:

0.04 to 4500 µg/l, PAHphe eq (corrected)

• Sensitivity:

<0.07 µg/l @ 1 Hz

• Excitation wavelength:

255 nm

• Emission wavelength:

365 nm

• Turbidity rejection:

≤5% deviation for 300 µg/l Phenanthrene

• ver turbidity range 0-1000 FNU (corrected)

Transmissometer

• Measurement range:

0 – 3.5 cm-1

• Resolution:

0.002 cm-1

• Pathlength:

1.25 cm

• Wavelength:

255 nm

PAH+ sensor

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Turbidity sensor

• Measurement range:

0 to 1000 FNU

• Sensitivity:

0.15 FNU @ 1Hz

• Measurement principle:

ISO 7027:1999(E) compliant

• Wavelength:

860 nm

• Bandwidth:

30 nm

Turbidity sensor

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PAH+ & Turbidity sensors

• Calibration valid for 2 years (unpowered)
• Calibration interval 12 months in use (return to CTG)
• On-site validation using solid sensor calibration

check

pH Sensor

• Calibration interval 1 month in use (on-site)
• Software based calibration protocol using pH4 &

pH7 buffer tablets

Sensor calibration & validation

Optical sensor calibration check

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Touchscreen GUI

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GUI – home screen

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Sea Sentry

• Sensors
• Digital pH probes (pre-calibrated)
• Turbidity sensor, ISO 7027:1999(E) compliant
• Extended range PAHphe eq sensor
• Turbidity, ‘colour’ and temperature correction
• Integrated sensor validation/calibration

protocols

• Solid standards for optical sensor validation
• System
• Integrated pump & de-bubbler
• Pneumatic anti-fouling protection
• Single board interface electronics
• Touchscreen Graphical User Interface

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Thank You

www.chelsea.co.uk