DECKMA OMD-24 Series 15ppm Bilge Alarm Unit

Overview

DECKMA OMD-24 Series 15ppm Bilge Alarm Unit | IMO Approved Marine Oil Content Monitor

The DECKMA OMD-24 Series 15ppm Bilge Alarm Unit is a marine oil content monitoring system designed to continuously measure the oil concentration in treated bilge water discharged from approved oily water separators. Developed for commercial vessels and offshore applications, the OMD-24 Series helps ship operators comply with MARPOL Annex I and IMO Resolution MEPC.107(49) by monitoring oil content, activating alarms, and controlling overboard discharge when permitted oil concentration limits are exceeded. The system combines a compact control unit, optical measuring cell, and built-in data logging to deliver dependable long-term performance in demanding marine environments.

At Ship Care Service, we supply genuine DECKMA OMD-24 Series 15ppm Bilge Alarm Units, measuring cells, spare parts, replacement accessories, and technical support for commercial vessels, offshore platforms, shipyards, and marine engineering companies worldwide.

What is the DECKMA OMD-24 Series?

The DECKMA OMD-24 Series is an IMO-approved 15ppm Bilge Alarm Unit installed downstream of an approved oily water separator. It continuously measures the oil concentration in treated bilge water before discharge overboard.

If the measured oil concentration exceeds the configured alarm level, the system activates visual and audible alarms and can automatically operate an Automatic Stopping Device (ASD) to prevent non-compliant discharge. The unit also records operational events and alarm history, supporting onboard maintenance and regulatory inspections.

Why a 15ppm Bilge Alarm is Important

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

A certified bilge alarm helps operators:

• Support compliance with MARPOL Annex I

• Meet IMO MEPC.107(49) requirements

• Prevent accidental oil discharge

• Protect the marine environment

• Assist during Port State Control inspections

• Maintain discharge records

• Improve onboard environmental compliance

How the DECKMA OMD-24 Series Works

The OMD-24 Series continuously monitors treated bilge water whenever the oily water separator is operating.

Step 1 – Bilge Water Sampling

A continuous sample of 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 the oil concentration using an optical measurement principle, providing real-time monitoring of treated bilge water.

Step 3 – Signal Processing

The computer unit continuously evaluates:

• Oil concentration

• Alarm conditions

• Measuring cell status

• System health

• Operational records

The graphic display provides operators with real-time operating information and alarm status.

Step 4 – Alarm & Automatic Discharge Control

If oil concentration exceeds the configured alarm level, the system can:

• Activate visual alarms

• Activate audible alarms

• Operate the Automatic Stopping Device (ASD)

• Stop or divert overboard discharge

• Record alarm events through the integrated data logging system

This helps prevent overboard discharge that exceeds permitted oil concentration limits.

Key Features of the DECKMA OMD-24 Series

IMO Type Approved

The OMD-24 Series exceeds the performance requirements for 15ppm Bilge Alarms specified in IMO Resolution MEPC.107(49) when installed with approved oily water separator systems.

Adjustable Alarm Set Points

The unit is factory supplied with dual alarms set at 15 ppm, while alarm values from 1 ppm to 15 ppm can be adjusted on site to suit operational requirements.

Graphic Display

The integrated graphic display allows operators to monitor:

• Oil concentration

• Alarm status

• System information

• Operating parameters

• Maintenance information

Integrated Data Logging

The OMD-24 Series records operational events and alarm history, providing valuable information for maintenance planning and regulatory inspections.

Optional Measuring Cell Cleaning Systems

Depending on the selected model, the OMD-24 Series can be supplied with:

• Manual Cell Cleaning

• Measuring Cell Cleaning Unit (MCU)

• Automatic Cell Cleaning Device

• Electric Switchover Valve

These options help reduce maintenance requirements while supporting consistent measurement performance.

Flexible Installation

The computer unit and measuring cell can be installed together or separately, making the OMD-24 Series suitable for new vessel construction and retrofit applications where installation space may be limited.

Typical Applications

The DECKMA OMD-24 Series is commonly installed on:

• Container Ships

• Bulk Carriers

• Oil Tankers

• Chemical Tankers

• Offshore Support Vessels

• Passenger Ships

• Naval Vessels

• General Cargo Ships

• Marine Power Plants

Industries We Serve

The OMD-24 Series is widely used across:

• Commercial Shipping

• Offshore Oil & Gas

• Marine Engineering

• Ship Management

• Shipyards

• Marine Service Companies

• Port Operations

• Marine Environmental Compliance

Who Uses the DECKMA OMD-24 Series?

Typical users include:

• Chief Engineers

• Marine Engineers

• Technical Superintendents

• Shipowners

• Ship Management Companies

• Offshore Operators

• Marine Service Engineers

• Environmental Compliance Officers

• Shipyards

Why Choose the DECKMA OMD-24 Series?

Marine operators worldwide choose the DECKMA OMD-24 Series because it offers:

• Continuous 15ppm oil content monitoring

• IMO MEPC.107(49) compliant performance

• Adjustable alarm settings

• Integrated data logging

• Graphic display for easy operation

• Flexible installation options

• Optional automatic measuring cell cleaning

• Reliable long-term operation in marine environments

Technical Overview

The DECKMA OMD-24 Series 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 OMD-24 Series continuously monitors oil content before overboard discharge, helping vessels comply with MARPOL Annex I and IMO Resolution MEPC.107(49).

The system consists of a computer unit, an optical measuring cell, and associated sampling and communication components. During operation, treated bilge water flows through the measuring cell where oil concentration is continuously measured. The computer unit processes the measured values, supervises the complete monitoring system, records operational events, and activates alarms or automatic stopping devices whenever oil concentration exceeds the configured discharge limit.

Its modular design, integrated event recording, adjustable alarm settings, and optional automatic measuring cell cleaning make the OMD-24 Series suitable for commercial vessels, offshore installations, and retrofit projects.

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

Main Components of the OMD-24 Series

The DECKMA OMD-24 Series consists of several integrated components designed for continuous oil content monitoring.

Computer Unit

The computer unit serves as the central operating and monitoring interface.

Its functions include:

• Continuous oil content monitoring

• Alarm processing

• System configuration

• Event recording

• Display management

• Automatic Stopping Device (ASD) control

• Self-diagnostics

The graphic display provides operators with real-time operating information and alarm status.

Optical 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 reliability

Depending on the system configuration, optional automatic cleaning devices are available to simplify maintenance.

Sampling System

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

Automatic Stopping Device (ASD) Interface

When oil concentration exceeds the configured alarm value, the OMD-24 Series can activate an Automatic Stopping Device to stop or divert overboard discharge.

Data Logging System

The integrated memory records important operational information including:

• Alarm history

• Operational events

• System status

• Maintenance records

This information supports onboard maintenance and inspection requirements.

Working Principle

The DECKMA OMD-24 Series continuously monitors treated bilge water whenever the oily water separator is operating.

Step 1 – Continuous Bilge Water Sampling

A representative sample of treated bilge water flows continuously through the measuring cell.

Step 2 – Optical Oil Content Measurement

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

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

Step 3 – Digital Signal Processing

The computer unit continuously processes measured values while supervising:

• Oil concentration

• Measuring cell status

• Alarm conditions

• System health

• Operational records

Step 4 – Alarm & Automatic Discharge Protection

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

• Activate visual alarms

• Activate audible alarms

• Operate the Automatic Stopping Device

• Stop or divert overboard discharge

• Record alarm events for maintenance and inspection purposes

This helps prevent non-compliant discharge of oily water into the marine environment.

Advantages of the DECKMA OMD-24 Series

Continuous Oil Content Monitoring

The OMD-24 Series continuously supervises treated bilge water throughout separator operation.

Regulatory Compliance

The system supports compliance with international marine pollution prevention regulations for oily water discharge.

Flexible Installation

The modular design allows installation on both new vessels and retrofit projects with varying machinery layouts.

Adjustable Alarm Settings

Alarm values can be configured within the allowable operating range to suit vessel requirements while maintaining regulatory compliance.

Integrated Event Recording

Built-in event logging provides valuable operational history for maintenance planning and inspections.

Optional Automatic Measuring Cell Cleaning

Optional measuring cell cleaning systems help reduce contamination and simplify routine maintenance.

Marine-Grade Construction

Designed specifically for marine environments, the OMD-24 Series operates reliably under:

• High humidity

• Engine room vibration

• Continuous operation

• Marine temperature variations

• Demanding onboard conditions

Routine Maintenance

Routine maintenance helps ensure accurate oil content measurement and reliable long-term operation.

Before Operation

Inspect:

• Computer unit display

• Alarm indicators

• Measuring cell condition

• Sampling lines

• Electrical connections

Verify that the system indicates normal operating condition before operating the oily water separator.

Weekly Inspection

Check:

• Measuring cell cleanliness

• Sampling flow

• Alarm operation

• Display information

• Visible leakage

Inspect the sampling arrangement for contamination or blockage.

Monthly Inspection

Inspect:

• Measuring cell

• Sampling system

• Optional cleaning device

• Electrical wiring

• Connectors

• Mounting hardware

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

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 documented within the vessel's Planned Maintenance System (PMS).

Common Operational Problems

Although the OMD-24 Series is designed for dependable long-term service, certain operational issues may occasionally occur.

Problem: High Oil Content Alarm

Possible Causes

• Oily water separator malfunction

• Excessive oil contamination

• Dirty measuring cell

• Incorrect separator operation

Recommended Solution

Inspect the oily water separator, verify system performance, and clean the measuring cell if necessary.

Problem: Measuring Cell Contamination

Possible Causes

• Oil deposits

• Sludge accumulation

• Insufficient cleaning

• Dirty sampling lines

Recommended Solution

Inspect and clean the measuring cell according to DECKMA maintenance procedures.

Problem: No Sample Flow

Possible Causes

• Blocked sampling line

• Closed isolation valve

• Sampling pump issue

• Air trapped in the sampling system

Recommended Solution

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

Problem: Display or Communication Fault

Possible Causes

• Loose electrical connection

• Power interruption

• Wiring damage

• Internal electronic fault

Recommended Solution

Verify the electrical supply, inspect communication wiring, and confirm correct control unit operation.

Problem: Frequent False Alarms

Possible Causes

• Contaminated measuring cell

• Air bubbles in sample flow

• Calibration drift

• Sampling instability

Recommended Solution

Inspect the measuring cell, verify sample flow stability, and perform calibration verification where required.

Calibration Recommendations

To maintain accurate oil content measurement, periodic calibration verification should be carried out according to DECKMA maintenance procedures and the vessel's Planned Maintenance System.

Calibration is generally recommended:

• During scheduled maintenance

• After replacing the measuring cell

• Following major servicing

• After extended shutdown

• According to manufacturer recommendations

• As required by company maintenance procedures

Genuine Spare Parts Available

Ship Care Service supplies genuine replacement parts for the DECKMA OMD-24 Series, including:

• Optical Measuring Cells

• Computer Units

• Display Modules

• Sampling Components

• Solenoid Valves

• Measuring Cell Cleaning Units (MCU)

• Automatic Cleaning Components

• Power Supply Modules

• Wiring Harnesses

• Connectors

• Mounting Hardware

• Replacement Accessories

Availability depends on the installed system configuration.

Buying Guide

Before purchasing an OMD-24 Series unit or replacement components, consider the following:

Verify System Compatibility

Confirm compatibility with the 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

• Reliable alarm operation

• Long equipment service life

• Proper regulatory compliance

• Full compatibility with the installed system

Work with an Experienced Marine Supplier

Choose a supplier capable of providing:

• Genuine DECKMA products

• Technical assistance

• Spare parts support

• Worldwide marine supply

• After-sales service

Why Marine Operators Choose the DECKMA OMD-24 Series

The DECKMA OMD-24 Series 15ppm Bilge Alarm Unit is trusted because it offers:

• Continuous oil content monitoring

• IMO-compliant operation

• Adjustable alarm settings

• Integrated event recording

• Flexible installation

• Optional automatic measuring cell cleaning

• Easy maintenance

• Reliable long-term marine performance