Brannstrom BilgMon 488 15ppm Bilge Alarm Unit

Overview

Brannstrom BilgMon 488 15ppm Bilge Alarm Unit | IMO Approved Oil Content Monitoring System

The Brannstrom BilgMon 488 15ppm Bilge Alarm Unit is a type-approved marine oil content monitoring system designed to continuously measure the oil concentration in treated bilge water discharged from approved oily water separators. The unit helps vessels comply with MARPOL Annex I and IMO Resolution MEPC.107(49) by monitoring oil content and activating an alarm or automatic discharge stopping device (ASD) whenever the discharge exceeds the permitted limit. Its compact design, detachable measuring cell, and user-friendly interface make it suitable for both new installations and retrofit projects.

At Ship Care Service, we supply genuine Brannstrom BilgMon 488 15ppm Bilge Alarm Units, measuring cells, spare parts, accessories, and technical support for commercial vessels, offshore installations, and marine engineering companies worldwide.

What is the Brannstrom BilgMon 488?

The BilgMon 488 is a certified 15ppm Bilge Alarm installed downstream of an approved oily water separator. Its purpose is to continuously monitor the oil content of treated bilge water before discharge overboard.

If the oil concentration exceeds the configured alarm level, the BilgMon 488 activates alarm outputs and can automatically signal an Automatic Stopping Device (ASD) to divert the discharge back to the bilge tank, preventing non-compliant overboard discharge. The system also records operational events and alarm history for inspection purposes.

Why a 15ppm Bilge Alarm is Important

International marine pollution regulations require ships fitted with oily water separators to continuously monitor discharged bilge water.

Using a certified bilge alarm helps operators:

• Comply with MARPOL Annex I requirements

• Support IMO MEPC.107(49) compliance

• Prevent accidental oil discharge

• Protect the marine environment

• Assist during Port State Control inspections

• Maintain accurate discharge records

• Improve environmental management onboard

How the BilgMon 488 Works

The BilgMon 488 continuously monitors treated bilge water during separator operation.

Step 1 – Bilge Water Sampling

A sample of treated bilge water flows through the measuring cell installed after the oily water separator.

Step 2 – Oil Content Measurement

The measuring cell continuously measures the oil concentration using an optical scattered-light measurement principle, providing real-time oil content information.

Step 3 – Signal Processing

Measurement data is processed by the master unit, which continuously evaluates:

• Oil concentration

• Alarm status

• System condition

• Sensor operation

• Recorded operational data

Step 4 – Alarm & Automatic Control

When oil concentration exceeds the preset alarm value, the system can:

• Activate visual alarms

• Activate audible alarms

• Trigger the Automatic Stopping Device (ASD)

• Divert discharge back to the bilge tank

• Record the alarm event for future inspection

This helps prevent non-compliant discharge overboard.

Key Features of the Brannstrom BilgMon 488

IMO Type Approved

The BilgMon 488 is type approved in accordance with IMO Resolution MEPC.107(49) for use with approved 15ppm oily water separator systems.

Compact Marine Design

Its compact dimensions make it suitable for both new vessel installations and retrofit projects where installation space is limited.

Detachable Measuring Cell

A unique detachable measuring cell with wireless communication can be replaced with a factory-calibrated unit, reducing maintenance time and simplifying calibration.

Automatic Fresh Water Flushing

The system supports automatic fresh water flushing to help keep the measuring cell clean and maintain reliable measurement performance.

LCD Display & Keypad

The integrated LCD display and keypad provide operators with convenient access to:

• Oil concentration

• Alarm status

• System settings

• Operating information

• Stored data

Data Logging

Operational events, alarm history, and separator status can be reviewed through the display or retrieved via the USB interface for inspection and maintenance purposes.

Typical Applications

The Brannstrom BilgMon 488 is commonly installed on:

• Cargo Ships

• Container Ships

• Bulk Carriers

• Oil Tankers

• Chemical Tankers

• Offshore Support Vessels

• Passenger Ships

• Naval Vessels

• Marine Power Plants

Industries We Serve

The BilgMon 488 is widely used across:

• Commercial Shipping

• Offshore Oil & Gas

• Marine Engineering

• Ship Management

• Shipyards

• Marine Service Companies

• Port Authorities

• Industrial Marine Facilities

Who Uses the BilgMon 488?

Typical users include:

• Chief Engineers

• Marine Engineers

• Technical Superintendents

• Shipowners

• Ship Management Companies

• Offshore Operators

• Marine Service Engineers

• Shipyards

• Environmental Compliance Officers

Why Choose the Brannstrom BilgMon 488?

Marine operators worldwide choose the Brannstrom BilgMon 488 because it offers:

• IMO MEPC.107(49) type approval

• Continuous 15ppm oil content monitoring

• Compact retrofit-friendly design

• Detachable wireless measuring cell

• Automatic fresh water flushing

• Event recording and data logging

• Easy calibration and maintenance

• Reliable long-term operation in marine environments

Technical Overview

The Brannstrom BilgMon 488 15ppm Bilge Alarm Unit is a certified marine oil content monitoring system designed to continuously measure the oil concentration in treated bilge water discharged from approved oily water separator systems. Installed downstream of the separator, the unit provides continuous monitoring to help vessels comply with MARPOL Annex I and IMO MEPC.107(49) discharge requirements.

The system consists of a control unit, a measuring cell, and associated sampling and communication components. During operation, the measuring cell continuously analyzes treated bilge water, while the control unit processes the measured values, supervises system status, records operational events, and activates alarms or automatic stopping devices whenever the oil concentration exceeds the permitted discharge limit.

Its compact design, detachable measuring cell, and integrated data logging make the BilgMon 488 suitable for commercial vessels, offshore installations, and retrofit projects.

Note: Technical configuration, communication interfaces, and installation arrangements may vary depending on vessel design and oily water separator manufacturer. Always verify equipment details using the equipment nameplate and official Brannstrom documentation.

Main Components of the BilgMon 488

The BilgMon 488 consists of several integrated components that work together to provide reliable oil content monitoring.

Control Unit

The control unit serves as the central operating interface.

Its functions include:

• Continuous oil content monitoring

• Alarm management

• System configuration

• Event recording

• Display operation

• Automatic stopping device control

• Self-diagnostics

The LCD display allows operators to view system status and operating information.

Measuring Cell

The measuring cell continuously analyzes treated bilge water flowing from the oily water separator.

Its functions include:

• Optical oil content measurement

• Continuous sampling

• Stable long-term monitoring

• High measurement accuracy

The detachable design simplifies routine maintenance and replacement.

Sampling System

The sampling arrangement directs treated bilge water through the measuring cell to allow continuous oil concentration monitoring during separator operation.

Automatic Stopping Device (ASD) Interface

When the oil concentration exceeds the configured alarm level, the BilgMon 488 can activate an Automatic Stopping Device to prevent non-compliant overboard discharge.

Data Logging System

The BilgMon 488 records important operational information, including:

• Alarm history

• Operating events

• System status

• Measurement records

Stored information can assist with inspections and maintenance activities.

Working Principle

The BilgMon 488 continuously monitors treated bilge water whenever the oily water separator is operating.

Step 1 – Continuous Water Sampling

Treated bilge water flows through the measuring cell installed after the oily water separator.

Step 2 – Optical Oil Content Measurement

The measuring cell continuously measures oil concentration using an optical sensing method.

The detector identifies changes in oil concentration while maintaining stable measurement performance.

Step 3 – Signal Processing

The control unit continuously processes measured values while supervising:

• Oil concentration

• Sensor condition

• Alarm status

• System health

• Operational records

Step 4 – Alarm & Discharge Protection

When oil concentration exceeds the configured alarm value, the system can:

• Activate visual alarms

• Activate audible alarms

• Operate the Automatic Stopping Device

• Stop or divert discharge according to vessel configuration

• Record the alarm event

This helps prevent accidental discharge of oily water exceeding regulatory limits.

Advantages of the Brannstrom BilgMon 488

Continuous Oil Content Monitoring

The BilgMon 488 continuously supervises treated bilge water during separator operation.

Regulatory Compliance

The system supports compliance with international marine pollution prevention requirements for bilge water discharge.

Compact Installation

Its compact construction allows installation on new vessels as well as retrofit applications where available space is limited.

Easy Maintenance

The detachable measuring cell simplifies servicing, inspection, and replacement while reducing maintenance downtime.

Automatic Cleaning Support

The system supports fresh water flushing to help maintain reliable measuring performance and reduce contamination.

Marine-Grade Construction

Designed for demanding marine environments, the BilgMon 488 provides reliable operation under conditions including:

• High humidity

• Engine room vibration

• Continuous operation

• Marine temperature variations

Routine Maintenance

Regular maintenance helps maintain accurate oil content monitoring and reliable system operation.

Before Operation

Inspect:

• Control unit display

• Alarm indicators

• Measuring cell condition

• Electrical connections

• Sampling line condition

Verify normal operating status before running the oily water separator.

Weekly Inspection

Check:

• Measuring cell cleanliness

• Alarm operation

• Display information

• Sampling flow

• Visible leakage

Inspect the sampling arrangement for contamination or blockage.

Monthly Inspection

Inspect:

• Measuring cell

• Fresh water flushing system

• Sampling lines

• Electrical wiring

• Connectors

• Mounting hardware

Clean the measuring cell according to the manufacturer's maintenance recommendations.

Annual Maintenance

Recommended maintenance includes:

• Functional testing

• Measuring cell inspection

• Calibration verification

• Alarm testing

• Data logging verification

• Electrical inspection

• Sampling system inspection

Maintenance activities should be recorded in the vessel's Planned Maintenance System (PMS).

Common Operational Problems

Although the BilgMon 488 is designed for dependable long-term operation, certain issues may occasionally occur.

Problem: High Oil Content Alarm

Possible Causes

• Oily water separator malfunction

• Excessive oil contamination

• Dirty measuring cell

• Improper separator operation

Recommended Solution

Inspect the separator, clean the measuring cell if required, and verify separator performance.

Problem: Measuring Cell Contamination

Possible Causes

• Oil deposits

• Sludge accumulation

• Poor flushing

• Dirty sampling lines

Recommended Solution

Inspect and clean the measuring cell following the manufacturer's maintenance procedures.

Problem: No Sample Flow

Possible Causes

• Blocked sampling line

• Closed isolation valve

• Pump problem

• Air trapped in sampling system

Recommended Solution

Inspect the sampling arrangement and restore proper flow before resuming operation.

Problem: Communication or Display Fault

Possible Causes

• Loose electrical connection

• Power supply interruption

• Internal electronic fault

• Wiring damage

Recommended Solution

Verify electrical supply, inspect wiring, and confirm proper control unit operation.

Problem: Frequent False Alarms

Possible Causes

• Contaminated measuring cell

• Air bubbles in sample flow

• Improper calibration

• Sampling instability

Recommended Solution

Inspect the sampling system, clean the measuring cell, and verify calibration status.

Calibration Recommendations

Periodic calibration verification helps maintain reliable oil content measurement.

Calibration is generally recommended:

• During scheduled maintenance

• After replacing the measuring cell

• Following major servicing

• After extended shutdown

• According to Brannstrom maintenance procedures

• As required by company Planned Maintenance System

Genuine Spare Parts Available

Ship Care Service supplies genuine replacement parts for the Brannstrom BilgMon 488, including:

• Measuring Cells

• Control Units

• Display Modules

• Sampling Components

• Solenoid Valves

• Flushing Components

• Power Supply Modules

• Wiring Harnesses

• Connectors

• Mounting Hardware

• Replacement Accessories

Availability depends on the installed system configuration.

Buying Guide

Before purchasing a BilgMon 488 or replacement parts, consider the following:

Verify System Compatibility

Confirm compatibility with your installed oily water separator and vessel configuration.

Confirm Equipment Identification

Providing the following information helps identify compatible replacement components:

• Model Number

• Serial Number

• Equipment Nameplate

• Oily Water Separator Model

• Existing Part Number (if available)

Choose Genuine Components

Using genuine replacement parts helps maintain:

• Accurate oil content monitoring

• Stable system performance

• Long equipment service life

• Proper regulatory compliance

• Reliable compatibility

Work with an Experienced Marine Supplier

Choose a supplier capable of providing:

• Genuine Brannstrom products

• Technical assistance

• Spare parts support

• Worldwide marine supply

• After-sales service

Why Marine Operators Choose the Brannstrom BilgMon 488

The Brannstrom BilgMon 488 15ppm Bilge Alarm Unit is trusted because it offers:

• Continuous oil content monitoring

• IMO-approved operation

• Compact installation

• Easy maintenance

• Detachable measuring cell

• Automatic discharge protection

• Built-in data logging

• Reliable long-term marine performance