JOWA SeaGuard 15ppm Bilge Alarm – Complete Technical Guide, Maintenance, Calibration, Troubleshooting & IMO MEPC Compliance
JOWA SeaGuard 15ppm Bilge Alarm
Manufacturer
JOWA AB
Country of Origin
Sweden
Product Type
15ppm Bilge Alarm / Oil Content Monitoring System
Marine Application
Oily Water Separator (OWS) Monitoring & MARPOL Pollution Prevention System
Product Introduction
The JOWA SeaGuard 15ppm Bilge Alarm is one of the most widely recognized marine environmental protection systems used onboard commercial vessels worldwide. Designed and manufactured by JOWA Sweden, the SeaGuard continuously measures the oil content of bilge water discharged through an Oily Water Separator (OWS).
The system ensures compliance with MARPOL Annex I regulations, preventing the discharge of oily water exceeding the internationally permitted limit of 15 parts per million (ppm).
Modern vessels rely on the SeaGuard system to monitor oil concentration, activate alarms, and automatically stop overboard discharge whenever excessive oil content is detected.
Original Product Image
The image above shows an actual JOWA SeaGuard 15ppm Bilge Alarm supplied by SM MARINE SERVICE™, including the control unit and oil content measuring cell assembly.
What Is the JOWA SeaGuard 15ppm Bilge Alarm?
The SeaGuard is a marine-approved oil content monitoring device installed after the Oily Water Separator.
Its primary functions include:
- Continuous oil content measurement
- Monitoring bilge water discharge quality
- Activating alarms above 15 ppm
- Preventing illegal discharge
- Protecting the marine environment
- Ensuring MARPOL compliance
The system continuously analyzes water passing through the measuring cell and displays the oil concentration in real time.
JOWA SeaGuard System Images
Working Principle
The SeaGuard utilizes optical measurement technology to determine oil concentration in bilge water.
Operating Sequence
- Bilge water passes through the Oily Water Separator.
- Water enters the SeaGuard measuring cell.
- Optical sensors analyze oil contamination levels.
- Oil concentration is calculated in ppm.
- Reading is displayed on the control panel.
- If oil concentration exceeds 15 ppm, an alarm is activated.
- Automatic discharge stopping systems may be triggered.
This process ensures that only compliant water is discharged overboard.
Main Features
Continuous Oil Content Monitoring
Provides real-time oil concentration measurement.
MARPOL Compliance
Supports international environmental regulations.
Automatic Alarm Activation
Warns operators when limits are exceeded.
Automatic Overboard Protection
Can activate discharge stopping devices.
Digital User Interface
Easy operation and monitoring.
High Measurement Accuracy
Reliable oil content detection.
Marine Type Approval
Suitable for commercial vessel installations.
Additional Product Images
Main Components
1. Control Unit
The operator interface and monitoring center.
Functions
- Oil content display
- Alarm monitoring
- Configuration settings
2. Measuring Cell
The core sensing section.
Functions
- Oil detection
- Optical measurement
- Signal generation
3. Sampling System
Directs water through the measuring cell.
Functions
- Sample flow control
- Measurement consistency
4. Alarm Circuit
Provides warning outputs.
Functions
- High oil content alarm
- System fault alarm
5. Automatic Discharge Interface
Communicates with discharge control systems.
Functions
- Valve control
- Discharge prevention
Marine Applications
The SeaGuard is installed on:
Cargo Ships
- Bulk carriers
- Container vessels
Tankers
- Oil tankers
- Chemical tankers
Offshore Vessels
- Platform supply vessels
- Offshore support vessels
Passenger Ships
- Cruise vessels
- Ferries
Engine Room Systems
- Oily Water Separator Systems
- Bilge Water Treatment Systems
Shipboard Installation Images
MARPOL Requirements
According to MARPOL Annex I:
Maximum Permitted Discharge
- 15 ppm oil concentration
Alarm Activation
- Above 15 ppm
Automatic Stop Function
- Required on approved systems
Record Keeping
- Oil Record Book compliance
The SeaGuard system helps vessels meet these environmental obligations.
Alarm Functions
High Oil Content Alarm
Activated when oil concentration exceeds 15 ppm.
Possible Causes
- OWS malfunction
- Excessive oil contamination
- Separator performance issues
Measuring Cell Alarm
Indicates contamination or measurement issues.
Possible Causes
- Dirty measuring cell
- Sensor contamination
Sample Flow Alarm
Indicates inadequate water flow.
Possible Causes
- Blocked sampling line
- Valve restriction
System Fault Alarm
Indicates internal equipment malfunction.
Common Problems & Troubleshooting
Reading Permanently High
Possible Causes
- Dirty measuring cell
- Sensor contamination
- Actual oil contamination
Corrective Actions
- Clean measuring chamber
- Inspect OWS performance
- Verify calibration
No Reading on Display
Possible Causes
- Power failure
- Fuse issue
- Wiring fault
Corrective Actions
- Verify supply voltage
- Check fuses
- Inspect wiring
Frequent 15ppm Alarm
Possible Causes
- OWS malfunction
- Incorrect separator operation
- Excessive bilge contamination
Corrective Actions
- Inspect separator
- Check filter elements
- Verify bilge treatment process
Sample Flow Failure
Possible Causes
- Blocked line
- Valve problem
Corrective Actions
- Clean piping
- Verify flow path
Maintenance Tips
Daily Checks
- Verify display operation
- Check alarm status
Weekly Checks
- Inspect sample flow
- Verify alarm functions
Monthly Checks
- Clean measuring cell
- Inspect optical surfaces
Quarterly Maintenance
- Verify calibration
- Test automatic stop functions
Annual Maintenance
- Complete performance test
- Replace worn components
- Verify MARPOL compliance
Maintenance Images
Why Ships Still Use JOWA SeaGuard
The SeaGuard remains a preferred choice because:
- Proven Swedish technology
- Worldwide acceptance
- Reliable performance
- Easy maintenance
- Accurate measurement
- MARPOL compliance support
- Long operational lifespan
Thousands of commercial vessels continue to operate SeaGuard systems successfully.
Frequently Asked Questions (FAQ)
What is the purpose of the SeaGuard?
It measures oil concentration in bilge water before overboard discharge.
Why is 15 ppm important?
MARPOL regulations prohibit discharge above 15 ppm.
Can the SeaGuard stop overboard discharge?
Yes. Approved systems can automatically control discharge valves.
Does the SeaGuard require calibration?
Yes. Regular calibration is essential for accurate operation.
What causes false alarms?
Dirty measuring cells, sensor contamination, or calibration issues.
Short Product Description
The JOWA SeaGuard 15ppm Bilge Alarm is a Swedish-designed oil content monitoring system used with marine Oily Water Separators. It continuously measures oil concentration in discharged bilge water and ensures compliance with MARPOL environmental regulations. Featuring accurate optical sensing, automatic alarms, and reliable operation, the SeaGuard remains one of the most trusted bilge monitoring systems in the marine industry.
Assembly Details
Complete JOWA SeaGuard Assembly Includes
1. Main Control Unit
- Digital display
- Alarm indicators
- Operator interface
2. Measuring Cell Assembly
- Optical sensor chamber
- Oil content detector
3. Sampling System
- Water inlet
- Water outlet
- Flow path components
4. Alarm Circuit Module
- High oil alarm
- Fault alarm
5. Automatic Stop Interface
- Discharge valve control
- OWS interlock outputs
6. Calibration Assembly
- Calibration adjustment system
- Reference settings
7. Electrical Connection Section
- Power supply terminals
- Signal terminals
8. Mounting Hardware
- Brackets
- Installation accessories
SM MARINE SERVICE™
Marine Automation & Navigation Equipment Supplier
Available Condition:
• New Equipment
• Used Equipment
• Refurbished Equipment
• Reconditioned Equipment
Stock Location:
• Bangladesh
• China
Services:
• Worldwide Shipping
• Technical Support
• Spare Parts Supply
• Marine Equipment Sourcing
Contact Information
SM MARINE SERVICE™
Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com