Wartsila 350753 N9374-014 Hamworthy G36 H3600a Oxygen Analyzer Panel

Wartsila 350753 N9374-014 Oxygen Analyzer Panel (Hamworthy SN53-10 G36 H3600a)

Wartsila 350753 (MPN: N9374-014) marine-grade heavy duty Oxygen Analyzer Panel designed for use with Hamworthy SN53-10, G36 and H3600a Inert Gas Systems (IGS). Purpose-built to survive the demanding working environment of commercial oil tankers, chemical carriers and product vessels, the panel provides accurate, real-time monitoring of O2 concentrations. It is designed to protect vessel cargo holds from flammable atmospheres by continuously providing visual and electrical telemetry of the gas mixture and enabling rigorous international maritime safety regulations.

This whole analyzer assembly is the primary diagnostics module for the Wartsila G36 Oxygen Analyzer (Part 01482) and the Wartsila H3600a Inert Gas Single/Double System (Part 01488). The unit has a universal 100 to 230 VAC electrical interface, and measures inputs from a heated zirconia cell and outputs dual, galvanically isolated 4 to 20 mA analog loop currents for automated distributed control system (DCS) monitoring.

Model Information:

• Manufacturer: Wartsila
• Main Assembly Part Number (MPN): N9374-014
• Wartsila Stock Code / Internal ID: 350753
• Sub-Module Equivalents: Wartsila G36 Oxygen Analyzer (01482) / Wartsila H3600a Inert Gas Analyzer (01488)
• System Designation: Hamworthy SN53-10 / H3600a IG Single / G3600 / G3601
• Country of Origin: Denmark

Technical Specifications: Wartsila 350753

Main Characteristics

1. Zirconia Cell Optimization: Engineered for great thermal stability and fast response times (90% of full scale <45 seconds) in challenging marine settings.
2. Dual Isolated Analog Loops: Two independent, range-selectable 4–20mA active outputs (max load 600 Omega) for robust DCS and alarm monitoring.
3. Flexible Diagnostic Display – Features a small, high-contrast touchscreen interface allowing local trend graphing and real-time problem tracking.
4. Artificial Calibration Routine: Allows for calibration with standard instrument air, eliminating the need for repeated handling of zero/span test gases by the crew.

Equipment Compatibility

• Inert Gas Systems: Hamworthy / Wartsila Moss IGS Systems, including single-board G3600 and double-board G3601 redundancy frames.
• Nitrogen Generators: Compatible with onboard marine membrane and PSA-type nitrogen systems requiring auxiliary discharge safety interlocks.
• Boiler Flue Gas Systems: Integrates directly with uptake flue gas sample lines from oil-fired marine boilers to optimize combustion control matrices.

Applications

1. Monitoring oxygen content downstream of commercial vessel Inert Gas Generators (IGGs) before entry into cargo tank mains.
2. Guarding against explosive gas accumulation by verifying void spaces, cofferdams, and ballast spaces on product, crude oil, and chemical carriers.
3. Managing combustion efficiency feedback controls inside marine thermal fluid heaters and auxiliary steam plants.

FAQs

Can the Wartsila N9374-014 replace older Hamworthy panel installations?

Yes. The Wartsila N9374-014 / G36p is purposely designed to drop into the physical cutouts of legacy panel mounts. It shares terminal similarities but offers superior galvanic isolation and an upgraded touchscreen display interface.

What causes a “System Fail” alarm on the Hamworthy G36 / H3600a?

A System Fail alarm typically signifies either a failure in the zirconia cell’s internal heating element or an inadequate sample gas flow pattern. Ensure that sample gas line pressure is maintained within the strict 0.05 to 1 bar window and flow remains between 2 to 8 l/min.

Does this analyzer panel require external calibration gas tanks?

No. While it supports external zero and span gas connections if mandatory under specific flag-state rules, it features built-in software logic for “Artificial Calibration” using simple, clean vessel instrument air.

Are the 4–20mA analog loop outputs active or passive?

The dual 4–20mA outputs generated by the Wartsila 350753 panel are active current loops capable of driving loads up to 600 Omega directly into your ship’s automation system without an auxiliary loop power injector.