The OMD-11's advanced optics and algorithms are designed to distinguish between oil droplets and solid particulate matter. For example, a concentration of 15 mg/l of black iron oxide would read as on an older monitor, but the same sample would read as only 2 ppm of Oil on the OMD-11. This feature drastically reduces false alarms and ensures the monitoring system only responds to actual oil contamination, making operations more reliable and efficient.

Before touching a single button, you must identify the hardware. The official manual splits the system into three main modules:

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The manual explains how to set alarm thresholds (typically 0.5–2.5 mg/l for pre-alarm, 5 mg/l for main alarm) and integrate with engine safety systems. It also covers time delays to prevent nuisance trips.

The OMD-11 uses advanced optical sensors to measure light scattering. It detects oil particles down to parts-per-million (ppm) levels. Specification Details 0 to 30 ppm (Adjustable up to 50 ppm) Accuracy Meets IMO Resolution MEPC.60(33) Linearity Better than ± 2 ppm Response Time Less than 5 seconds Power Supply 24V AC/DC, 115V AC, or 230V AC Output Signal 0–20 mA or 4–20 mA Alarm Relays 2 independent potential-free relays ⚙️ System Components and Operation The system consists of two primary units working in tandem. The Electronic Unit Houses the microprocessors. Displays the current ppm value on a digital screen. Controls the alarm relay thresholds. Records historical log data. The Measuring Cell Contains the optical glass tube. Houses the infrared transmitter and receiver. Directs the sample water stream. Must be kept clean to avoid false alarms. 🚀 Installation Guidelines

Often caused by a dirty measuring tube or air bubbles in the sample line. Ensure the sample flow is steady and the glass is clear.

Fix : Check continuity across the relay terminals during a test alarm.

The OMD-11 is designed according to IMO regulations (MEPC.107(49)) to monitor bilge water for oil content between 0-30 ppm, with an alarm trigger usually set at 15 ppm. It operates using an infrared measurement principle, ensuring precise, continuous measurement of oil content in water.