EGCS SENSOR CALIBRATION
CEMS pH Sensor & Water Management System Turbidity Sensor Calibration in EGCS
Exhaust Gas Cleaning Systems (EGCS) rely on precise monitoring and control to meet IMO and Vessel General Permit (VGP) regulations for exhaust gas and water discharge. Two critical components in this process are the Continuous Emission Monitoring System (CEMS) pH Sensor and the Water Management System (WMS) Turbidity Sensor, both of which require regular calibration to ensure accurate readings and compliance.
Importance of pH & Turbidity Sensor Calibration
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CEMS pH Sensors monitor the acidity of scrubber wash water to verify compliance with environmental discharge limits.
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WMS Turbidity Sensors measure particulate levels in discharged wash water, ensuring compliance with IMO and EPA turbidity standards.
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Regular calibration maintains accurate monitoring, preventing regulatory violations and environmental risks.
Calibration Process & Frequency
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pH Sensor Calibration:
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Conducted using buffer solutions to ensure accurate pH readings.
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Required annually at minimum, with more frequent calibration as per manufacturer guidelines.
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Turbidity Sensor Calibration:
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Verified using standard turbidity solutions to maintain measurement accuracy.
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Sensors must be calibrated regularly to detect changes in water quality and ensure correct wash water discharge levels.
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Regulatory Compliance Requirements
To comply with IMO, EPA, and VGP regulations, vessels must:
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Calibrate pH and turbidity sensors at least once a year or as per manufacturer recommendations.
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Perform functional tests on monitoring systems to ensure continuous compliance.
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Replace or recalibrate sensors as needed to maintain operational accuracy.
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Cease overboard wash water discharge if sensors are malfunctioning or uncalibrated.