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Overview
The Graviner Mk6 is one of the most established oil mist detection systems in the marine engine room safety sector — fitted across a broad range of commercial vessels including bulk carriers, tankers, container ships, and offshore vessels. Designed to detect potentially explosive oil mist concentrations in the crankcase of marine diesel engines before they reach ignition point, the Mk6 system is a critical last line of defence against catastrophic engine room fires and crankcase explosions. When the main PCB of this system fails, the entire detection unit is rendered non-operational — and the engine cannot be safely run without a functioning oil mist detector in place.
The Graviner Mk6 Main PCB (Part No. 44782-K071-02) is a direct replacement main printed circuit board for the Graviner Mk6 Oil Mist Detector. This is the central control and processing board of the Mk6 unit — the component responsible for processing sensor inputs, managing alarm logic, and driving system outputs. Available in both new and refurbished condition, this replacement PCB restores full detector functionality to a Mk6 system with a failed or degraded main board, without requiring replacement of the entire detection unit.
What sets this component apart from generic or unverified spare parts is the confirmed OEM part number. The 44782-K071-02 designation is the Graviner manufacturer’s own part reference for the Mk6 main PCB — ensuring the replacement board is compatible with the Mk6 system’s hardware, firmware, and sensor interface without the integration uncertainties that come with non-OEM alternatives. For vessel operators and ship managers who need to return a Mk6 oil mist detector to service quickly and with confidence, confirmed OEM part number compatibility is not optional — it is the correct procurement standard for a safety-critical detection system.
Key Features
Direct Replacement for Graviner Mk6 Oil Mist Detector
The 44782-K071-02 main PCB is the OEM-referenced central control board for the Graviner Mk6 Oil Mist Detector — the platform’s core processing component. As a direct replacement, the board installs into the existing Mk6 enclosure without physical or electrical modification, restoring the detector to its original design specification. For vessels where the oil mist detector is required to be fully operational for departure, port state control inspection, or class survey, confirmed direct replacement compatibility is the appropriate maintenance standard — not an approximation.
OEM Part Number 44782-K071-02 — Confirmed Component Identity
The Graviner part number 44782-K071-02 provides the manufacturer’s specific identification for this main PCB variant. For marine maintenance engineers and procurement teams sourcing Mk6 spare parts, working from the correct OEM part number eliminates the compatibility risk that comes from ordering against incomplete or incorrect references. The Mk6 platform has gone through multiple hardware generations, and sourcing a main PCB without confirming the correct part number could result in a board that physically resembles the original but is not electrically or firmware-compatible with the installed system.
Available New and Refurbished — Flexible Procurement Options
The Mk6 main PCB is offered in both new and refurbished condition, giving procurement teams the flexibility to match the component condition to the vessel’s maintenance budget and timeline. New stock provides full original specification with no prior service history. Refurbished units have been inspected and tested for functionality before supply — a practical and cost-effective option for vessels where new OEM stock is on extended lead time, discontinued, or where the maintenance budget calls for a tested alternative to a new board. For a detection system that may have been in service for 15–25 years, refurbished OEM-referenced boards are often the realistic procurement option.
Central Processing and Alarm Control Function
The main PCB is the operational heart of the Graviner Mk6 — responsible for processing oil mist concentration signals from the detector’s optical sensors, comparing readings against alarm thresholds, managing pre-alarm and main alarm outputs, and driving any connected shutdown or slowdown interlocks. A failed main PCB means the entire detector system is non-functional, regardless of the condition of the sensor head, power supply, or other components. Replacing a failed main PCB with the correct OEM-referenced board is therefore the single most direct route to restoring a non-functional Mk6 detector to full service.
Supports Crankcase Explosion Prevention Compliance
Oil mist detectors on marine diesel engines are required under SOLAS regulations and classification society rules to be operational when the engine is running. A non-operational Mk6 detector is not simply a maintenance issue — it is a compliance issue that can restrict vessel operations and expose the ship manager to class and flag state findings. Sourcing the correct replacement main PCB with verified OEM part reference keeps the vessel’s crankcase explosion prevention system operational and the engine room in a compliant safety configuration.
Technical Specifications
Component: Main PCB (Printed Circuit Board)
Compatible System: Graviner Mk6 Oil Mist Detector
Manufacturer: Graviner (Kidde / UTC Fire & Security)
Part Number: 44782-K071-02
Category: Oil Mist Detector Spare Part
Function: Central control, sensor signal processing, alarm logic, system output management
Condition: New & Refurbished
Application: Marine diesel engine crankcase oil mist detection
Benefits
Restores full Mk6 detector functionality without full unit replacement. Replacing a failed main PCB is significantly more cost-effective than sourcing or replacing the entire Mk6 detection unit. The main PCB is the component most commonly responsible for Mk6 system failures — restoring this single board returns the complete detector to operational status, preserving the existing sensor head, enclosure, wiring, and installation.
OEM part number eliminates compatibility guesswork. The 44782-K071-02 reference provides procurement teams with a direct, manufacturer-specific component identification — removing the risk of ordering a physically similar but electrically incompatible board from an unverified source. For a safety-critical system like an oil mist detector, compatibility confidence is not a preference — it is a maintenance requirement.
Returns the vessel’s crankcase explosion prevention system to compliance. A non-functional Mk6 detector can restrict engine operations and result in class or flag state deficiency findings. The fastest route to restoring compliance is sourcing the correct replacement main PCB — not waiting for a full unit replacement on extended lead time.
Refurbished availability supports realistic Mk6 fleet maintenance. For Mk6 systems that have been in service for many years, new OEM spare parts may be on long lead times or limited stock. Tested refurbished main PCBs provide a practical alternative that keeps ageing but still-functional Mk6 systems in service — a common and sensible approach for ship managers maintaining older engine room safety equipment.
Single component replacement reduces engine downtime. Sourcing and replacing the main PCB is a targeted repair that can typically be completed far faster than sourcing a full Mk6 replacement unit. For vessels where engine downtime has direct commercial and operational cost implications, a correctly identified spare PCB sourced promptly is the most operationally efficient maintenance solution.
Who It’s For
The Chief Engineer or Second Engineer Managing Mk6 Maintenance
You’re responsible for the engine room safety systems on a vessel equipped with Graviner Mk6 oil mist detectors. One of the Mk6 units has developed a fault — the main PCB has failed or is showing persistent error conditions that cannot be resolved through reset or routine maintenance. You need to source the correct replacement main PCB quickly, confirm the correct part number before ordering, and get the detector back in service before the next port call or departure. You need a supplier who can confirm the part, advise on availability in new or refurbished condition, and support a prompt supply to minimise engine downtime.
The Ship Manager or Fleet Superintendent Overseeing Planned Maintenance
You manage the planned maintenance programme for a fleet of vessels fitted with Graviner Mk6 oil mist detectors. You’re sourcing Mk6 main PCBs as fleet spare parts for inclusion in the vessel’s on-board spare parts inventory — or to support a scheduled drydock maintenance programme where Mk6 units will be serviced and worn components replaced. You need to confirm correct part numbers across your Mk6 fleet variants, obtain competitive pricing on new and refurbished stock, and arrange supply on a timeline that aligns with your planned maintenance schedule.
The Marine Electronics or Safety Equipment Service Engineer
You provide service, repair, and maintenance support for marine engine room safety equipment, including Graviner Mk6 oil mist detectors, on vessels calling at your port. You need to maintain a reliable source for Mk6 main PCBs in both new and refurbished condition — with confirmed OEM part numbers and tested functional status — to support your service contracts and on-call repair work on vessels with Mk6 faults.
Possible Applications
- Bulk carriers and general cargo vessels — Mk6 main PCB replacement for oil mist detectors fitted on large-bore two-stroke and four-stroke marine diesel main engines and auxiliaries
- Tankers (crude, product, and chemical) — Restoration of oil mist detection compliance on tanker main propulsion engines where Mk6 detector faults could restrict operations in sensitive cargo environments
- Container ships and ro-ro vessels — Prompt Mk6 main PCB sourcing to minimise engine downtime on high-frequency liner service vessels with tight port turnaround schedules
- Offshore support vessels and platform supply vessels — Oil mist detector maintenance for vessels with continuous offshore operational commitments where engine room safety system availability is a contract requirement
- Passenger vessels and ferries — Mk6 system maintenance for passenger vessel operators where engine room safety system compliance is subject to enhanced port state control scrutiny
- Drydock maintenance and class renewal programmes — Scheduled Mk6 PCB replacement during planned drydocking, five-yearly class renewal surveys, or mid-term maintenance periods
- Fleet spare parts provisioning — Main PCB stock sourcing for ship management companies maintaining Mk6 spare parts inventories across vessels with Graviner oil mist detection installations
- Marine safety equipment service companies — PCB sourcing for Mk6 service, repair, and maintenance contracts on vessels across the regional fleet
Trust and Certifications
Graviner Mk6 — A Recognised Standard in Marine Oil Mist Detection
Graviner (now part of the Kidde / UTC Fire & Security group) has been manufacturing oil mist detection equipment for the marine industry for decades. The Mk6 is one of the most widely installed oil mist detector platforms in the global commercial fleet — fitted as OEM equipment on vessels built across multiple generations by major shipyards worldwide. The 44782-K071-02 main PCB is the manufacturer’s own part reference for this component within the Mk6 system, providing the OEM-level compatibility assurance that is the correct standard for replacement of a safety-critical detection system component.
SOLAS-Required Equipment — Regulatory Context
Oil mist detectors on marine diesel engines are required under SOLAS Chapter II-1 regulations and classification society rules (including Lloyd’s Register, DNV, Bureau Veritas, ClassNK, and others) to be maintained in operational condition. A non-functional oil mist detector is a potential class deficiency that can result in operational restrictions. Sourcing the correct replacement main PCB with a confirmed OEM part number is the appropriate maintenance response — one that supports both operational continuity and documentary compliance with the vessel’s safety management system maintenance records.
Refurbished Units — Inspected and Tested Before Supply
Refurbished Mk6 main PCBs are inspected and tested for functionality before supply. For safety system components where operational reliability is linked directly to engine room safety and vessel compliance status, tested refurbished condition provides meaningful functional assurance over untested used components of unknown history. For ageing Mk6 systems where new OEM stock availability may be limited, tested refurbished boards provide a responsible and practical maintenance solution.
Supplied by Alright Engineering Solutions
The Graviner Mk6 Main PCB (44782-K071-02) is supplied through Alright Engineering Solutions Pte. Ltd. — a Singapore-based specialist supplier of marine safety system components, oil mist detector spare parts, and fixed and portable gas detection equipment. Alright Engineering Solutions supports vessel operators, ship managers, and marine service companies across the Singapore and regional market with spare parts sourcing, procurement support, and technical component identification assistance.
Accessories and Variants
Additional Graviner Mk6 Spare Components
Alright Engineering Solutions can assist with sourcing additional Graviner Mk6 system spare parts — detector heads, sensor assemblies, power supply boards, alarm output modules, and associated system components — to support comprehensive Mk6 maintenance programmes and vessel spare parts inventories. Contact our team with your Mk6 component requirements and part references for availability and quotation.
Graviner Mk4 and Mk5 Components
For vessels equipped with earlier Graviner oil mist detector generations — including the Mk4 and Mk5 platforms — Alright Engineering Solutions can advise on spare parts availability and sourcing options for older Graviner system variants. Contact our team with the specific Graviner model and part number requirements for your vessel.
Alternative Oil Mist Detection System Spares
For vessels fitted with other oil mist detector platforms — including Schaller Visatron, Dräger, or other manufacturers’ systems — Alright Engineering Solutions can advise on component sourcing and availability. Our team supports a broad range of marine engine room safety equipment spare parts requirements across detector platforms and generations.
Related Products from Alright Engineering Solutions
Graviner Mk6 Detector Head Assembly — Replacement optical sensor head for Mk6 oil mist detector units
Salwico CS3000 Display LCD PCB (BTM-4 R2) — Refurbished replacement display PCB for Salwico CS3000 fixed gas detection system
GX-8000 Sample Draw Multi Gas Monitor — Portable marine sample draw multi-gas monitor for confined space entry
RX-8700 Portable Gas Detector — ATEX/IECEx/MED-certified portable multi-gas monitor for marine applications
Get in Touch
If you need to source the Graviner Mk6 Main PCB (44782-K071-02) for an urgent vessel repair, a scheduled maintenance programme, or fleet spare parts provisioning — contact Alright Engineering Solutions to confirm availability in new or refurbished condition and request a formal quotation.
Our team can also assist with identifying additional Graviner Mk6 spare parts and related marine engine room safety equipment components for your vessel or fleet maintenance requirements.
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