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News / 2020/ DNV-GL type approves Sea Sentry scrubber wash water monitor

DNV-GL type approves Sea Sentry scrubber wash water monitor

15 Jul 2019
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Chelsea Technologies, a subsidiary of Sonardyne, on Thursday (12 July) said its Sea Sentry wash water monitoring system for ship exhaust gas cleaning systems has been awarded type approval by DNV-GL.

This accreditation, combined with certification for its measurement protocols from Class NK and DNV-GL, assures shipowners and operators that all available measures have been taken to verify that Sea Sentry provides accurate and robust data on compliance with IMO Annex VI wash water discharge regulations, it notes.

Sea Sentry provides a fully autonomous wash water monitoring system which monitors both the water inlet and outlet of wet exhaust gas scrubber systems. The system has the ability to accurately measure the polycyclic aromatic hydrocarbon, absorbance, turbidity (to ISO 7027: 1999), temperature and pH of scrubber wash water.

The system can accurately monitor wash water from open-loop, closed-loop and hybrid scrubber systems, setting the gold standard for accurate wash water monitoring.

In addition to type approval from DNV-GL, Sea Sentry and the methodology employed to accurately analyse wash water has been accredited by DNV-GL and Class NK, following extensive testing to ensure that Sea Sentry meets the required standards regarding calibration range, drift, accuracy, precision and noise, as well as the influence of turbidity, UV absorbance, temperature and salinity.

The effectiveness of Sea Sentry's mitigation method against air bubbles has also been demonstrated to the satisfaction of DNV-GL.

“Accurate monitoring for compliance with environmental regulations is a vital prerogative for the international shipping industry ahead of the 2020,” said Emma Johnson, Maritime Manager, Chelsea Technologies.

“Owners and operators are under increasing scrutiny to provide accurate data to demonstrate compliance whilst also maintaining operational efficiency and profitability, and protecting their reputation within the market.

“Achieving DNV-GL type approval, in addition to certification for its measurement protocols, is a significant step in our commitment to ensure for all of our monitoring systems meet the utmost standards in quality, accuracy, and operational efficiency, offering shipowners the reassurance they need that the significant investments they have made will ensure they will achieve compliance.”

Photo credit: Chelsea Technologies
Published: 15 July, 2019

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