Crowcon Multiscan++MED

Crowcon Multiscan++MED is developed specifically for marine industry requirements, providing continuous monitoring of flammable and toxic gas hazards across multiple shipboard zones. Certified by Lloyd’s Register in accordance with the Marine Equipment Directive and ATEX approved for use in hazardous areas, it supports compliance with the marine equipment standards expected by classification societies and flag states. When used with compatible MED-certified gas detectors, it forms a fully marine-approved fixed gas detection system for vessels, offshore platforms and other marine-related applications.

The control panel aggregates gas readings, alarms and system status from machinery spaces, cargo holds, pump rooms and accommodation areas into a central location. This centralised supervision enables rapid identification of abnormal conditions and timely alarm activation, helping protect crew, cargo and critical equipment while supporting vessel safety procedures.

For detailed technical data, consult the Specifications tab.

Crowcon Multiscan++MED is capable of managing and monitoring up to 64 gas detectors, supporting both addressable RS485 (EIA-485) detectors and 4–20 mA analogue devices. Certain panel variants accept up to 8 + 8 (16) analogue gas detectors directly, which simplifies compact systems by avoiding additional input hardware. For larger installations, modular input cards such as STG/IN8-S2 or STG/IN8-S2MED allow the system to scale in line with project demands.

The modular architecture is suited to both new-build projects and retrofit upgrades. It allows small systems to be installed initially and then expanded without replacing the main panel, preserving investment as vessel layouts or regulatory requirements change. Support for up to two galvanically isolated RS485 bus loops improves noise immunity and reliability on long cable runs, helping maintain signal integrity in electrically demanding marine environments.

Built around a powerful microprocessor, Crowcon Multiscan++MED provides advanced control, diagnostics and high reliability for safety-related functions. Eight preset relays are available on the control panel to drive local alarms and straightforward control actions. For more complex strategies, the system can be expanded using remote output cards such as STG/OUT16-S2 or STG/OUT16-S2MED, enabling centralised control of up to 128 open collector outputs and, with optional expansion, up to 256 channels.

This I/O capacity allows detailed shutdown, ventilation and damper control schemes to be implemented from a single platform. STG/8REL plug-and-play relay boards can be attached to output modules to convert open collectors to relay outputs, supporting integration with a wide range of shipboard devices. On some models, 8 + 8 relay outputs are available directly, simplifying design where extensive hardwired signalling is required. Configurable alarm thresholds and logic enable tailored responses to rising gas concentrations, aligning with vessel safety philosophies and helping maintain control in evolving situations.

Crowcon Multiscan++MED is housed in a robust metal cabinet, with dimensions suited to control room and engine control room panel layouts. EMC compliance supports dependable operation in electrically noisy environments, while ATEX approval addresses use in hazardous areas encountered on marine and offshore installations. The panel operates from a 220–230 Vac mains supply with low power consumption, supporting efficient operation on board.

The specified operating temperature and humidity ranges match typical marine machinery and accommodation spaces. Combined with continuous 24/7 operation, this ensures that gas hazards can be monitored during normal manned operation and during unmanned periods, contributing to a consistent safety posture over the vessel’s lifetime.

The graphic backlit LCD display provides a clear view of gas concentration values and overall system status in a range of lighting conditions. Multiple status LEDs, including versions with nine double LEDs, deliver instant visual indication of alarms and faults, reducing the time required to understand the situation and initiate the appropriate response.

Extensive self-testing and self-diagnostic functions automatically detect and help localise possible system faults, supporting fast troubleshooting and minimising downtime. Clear separation of inputs and outputs via remote cards further simplifies maintenance and system upgrades, as I/O can be added or replaced without extensive rework to the main panel.

Crowcon Multiscan++MED integrates readily with onboard safety, automation and monitoring architectures. An RS485 Modbus communication port supports communication with compatible gas detectors and external systems such as building management, PLC or SCADA platforms, extending visibility for engineering and operations teams.

An RS232 (RS232C) serial interface allows PC connection for configuration, supervision and data download, including access to the onboard event log. Events can be viewed at the panel or exported for analysis, supporting incident investigation and fleet-wide engineering review. A dedicated parallel printer port permits event memory reporting and real-time alarm printout, providing hard-copy records to support audits and regulatory documentation requirements.

Crowcon Multiscan++MED holds SIL2 functional safety certification in accordance with EN 50402, indicating its suitability for use in safety-related gas detection systems. This, combined with MED compliance, marine approvals, robust construction and comprehensive diagnostics, helps shipowners, yards and offshore operators demonstrate that their gas detection control solution aligns with both safety and regulatory obligations.

By centralising gas detection, simplifying integration with wider safety systems and enabling scalable expansion, Crowcon Multiscan++MED provides a marine-focused platform that supports consistent, reliable gas monitoring across complex vessels and offshore assets throughout their operational life.