DECKMA HAMBURG GmbH OMD-24 Bilge Alarm – Accurate Oil Detection. Reliable Marine Compliance.
The DECKMA HAMBURG GmbH OMD-24 Series is a marine 15 ppm Bilge Alarm Unit designed for use with oily water separator systems. It continuously monitors the oil content of water discharged from the separator and provides an alarm when the configured oil concentration limit is exceeded. The system measures 0–30 ppm, with the IMO-regulated monitoring range of 0–15 ppm, and features two adjustable alarm set points from 1–15 ppm, normally factory-adjusted to 15 ppm.
The OMD-24 uses an optical measuring principle, where an optical sensor array evaluates light scattered and absorbed by oil droplets in the sample stream; the signals are processed by a microprocessor to produce the oil-concentration output. It provides a graphic display, two independent alarm relays, optional 0/4–20 mA output, malfunction indication, and data-logging capability. The measuring cell is designed for a sample flow of 0.1–4 L/min, with sample temperatures from +1°C to +65°C, while the system has IP65 protection and operates from 24V AC/DC.
The OMD-24 is designed to meet the requirements of IMO Resolution MEPC.107(49) for 15 ppm Bilge Alarms and is intended for integration with shipboard oily water separators under MARPOL Annex I pollution-prevention requirements. DECKMA states that the OMD-24 performance exceeds the applicable IMO 15 ppm Bilge Alarm requirements. Correct installation close to the oily water separator helps minimize response delay, with the IMO framework requiring the Bilge Alarm response to be less than 5 seconds and the overall response to automatic stopping arrangements to remain within the specified limit
Why OMD-24 Is a Smart Choice for Bilge Water Monitoring
The OMD-24 Bilge Alarm continuously monitors the oil concentration of water discharged from an oily water separator. If the measured oil content reaches the configured alarm threshold, the system provides a visible alarm and activates the corresponding relay outputs.
With a measurement range of 0–30 ppm and an IMO monitoring range of 0–15 ppm, the OMD-24 offers dependable monitoring for vessels where accurate oil-content detection and environmental protection are critical.
Reliable Oily Water Separator Monitoring
An effective 15 ppm bilge alarm system plays an important role in preventing non-compliant oily water discharge. By continuously monitoring the separator outlet, the OMD-24 helps operators identify elevated oil concentrations before discharge conditions become a serious environmental or operational concern.
Its combination of accurate measurement, adjustable alarms, fault indication, relay outputs, and optional analog communication makes the OMD-24 a practical solution for modern marine oily water separator installations.
Key Benefits
Adjustable 15 PPM Alarm Settings
The OMD-24 is supplied with two factory-adjusted 15 ppm alarms. Alarm thresholds can be adjusted between 1 ppm and 15 ppm, allowing the system to be configured according to operational requirements.
High-Accuracy Oil Content Monitoring
The system is designed to provide measurement performance exceeding the requirements of IMO MEPC.107(49), supporting reliable monitoring of oily water separator discharge.
Fast Alarm Response
The OMD-24 provides rapid alarm response to help operators identify excessive oil concentration and take corrective action quickly.
Dual Independent Alarm Relays
Two independently adjustable alarm contacts provide flexible control and alarm functionality for shipboard oily water separator systems.
Built-In Malfunction Indication
The front-panel SYS LED provides an immediate indication of system status. A change from normal green indication to solid red alerts operators to a malfunction.
Optional 0/4–20 mA Output
An optional analog output enables connection to external recorders, meters, and vessel monitoring or automation systems.
IP65 Marine Protection
The IP65 enclosure provides protection against dust and water ingress, making the OMD-24 suitable for demanding marine and engine-room environments.
OMD-24 Technical Specifications
| Parameter | Specification |
|---|---|
| Measurement Range | 0–30 ppm |
| IMO Measurement Range | 0–15 ppm |
| Accuracy | Better than IMO MEPC.107(49) |
| Power Supply | 24V AC/DC ±10% |
| Power Consumption | <5 VA |
| Sample Flow | 0.1–4 L/min |
| Sample Temperature | +1°C to +65°C |
| Alarm Set Points | 1–15 ppm |
| Factory Alarm Setting | 15 ppm |
| Alarm Contacts | 2 Independent Changeover Contacts |
| Analog Output | 0/4–20 mA |
| Display | Graphic Display |
| Protection | IP65 |
| Ambient Temperature | +1°C to +55°C |
Get in Touch
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DECKMA OMD-24 Series – Smart 15 PPM Bilge Monitoring for IMO Compliance
Effective bilge water management is essential for maintaining marine environmental compliance and preventing the discharge of excessive oil content into the sea. The OMD-24 Series Bilge Alarm Unit is designed specifically for integration with 15 ppm oily water separator systems, providing accurate oil-content monitoring and reliable alarm protection for shipboard applications.
Engineered to meet and exceed the requirements of IMO Resolution MEPC.107(49), the OMD-24 combines accurate measurement, adjustable alarm settings, malfunction indication, and optional data logging capabilities in a compact marine-grade system.
Swift Marine Tech Services provides professional marine equipment solutions and technical support for bilge alarm systems, oily water separators, marine monitoring equipment, calibration, troubleshooting, and maintenance.