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Overview
Marine vessels operate across a wide range of electrical supply standards — 115V, 220V, 230V, and 240V at 60Hz are all common supply voltages depending on vessel flag, build yard, and electrical system design. The Graviner Mark 5 Oil Mist Detector is installed across this entire spectrum of vessel types, and one of the components that makes that possible is the Power Supply Select Card — the PCB that configures the detector’s internal power supply to operate correctly on the vessel’s specific supply voltage. When this card fails, is damaged, or is missing, the MK-5 detector either loses power entirely or operates on an incorrect supply configuration — both conditions that render the crankcase oil mist detection system non-functional and the vessel non-compliant with its class society’s crankcase protection requirements.
The Power Supply Select Card for Graviner Mark 5 Oil Mist Detector (Part No. 39832-704) is a refurbished replacement power supply select PCB for the Graviner MK-5 detector unit. As clearly visible on the card’s PCB markings — 115v 60∿, 220v 60∿, 230v 60∿, 240v 60∿ — this component provides voltage selection capability across the four primary AC supply standards in marine electrical systems, configuring the MK-5’s internal power supply to match the vessel’s installed electrical supply without requiring a separate external transformer or supply conditioning unit.
What makes this the correct procurement choice is the combination of OEM part number certainty and the specific multi-voltage selection function this card provides. The 39832-704 part number is the OEM-referenced designation for this power supply select card within the Graviner Mark 5 product family. For ship engineers and procurement teams who need to restore a Mark 5 detector to operational status on a specific vessel supply voltage — with confirmed component identity for spare parts documentation — this refurbished OEM-referenced card provides both the functional restoration and the procurement traceability that power supply components in a crankcase safety system require.
Key Features
Multi-Voltage Selection — 115V, 220V, 230V, 240V at 60Hz
The PCB markings on the 39832-704 card clearly identify four selectable supply voltage configurations: 115v 60∿, 220v 60∿, 230v 60∿, and 240v 60∿. This multi-voltage capability is what allows a single MK-5 detector variant to be installed and correctly powered across different vessel electrical systems without requiring external supply adaption. For vessels where the installed supply voltage is anything other than a single fixed standard — or for ship managers operating mixed fleets with different electrical configurations — the voltage selectability of this card is the feature that ensures correct detector power supply configuration on each individual vessel.
OEM Part Number 39832-704 — Confirmed Identity Within MK-5 Power Supply Architecture
The 39832-704 designation is the manufacturer’s own part reference for this power supply select card within the Mark 5 detector. Power supply PCBs are not interchangeable between detector models or generations without confirmed part number verification — a card from a different MK-5 variant may appear dimensionally compatible but carry different voltage selection configurations or circuit characteristics that result in incorrect supply conditioning or, in a worst case, supply voltage being applied incorrectly to downstream detector circuitry. The OEM part number eliminates that risk and provides the component identity confirmation required for maintenance documentation.
Refurbished Condition — Inspected and Functionally Assessed
The card is supplied in refurbished condition, inspected for physical condition and assessed before supply. For a power supply PCB within a crankcase safety detection system, functional assessment before supply is the relevant quality check — confirming that the card’s power supply conditioning and voltage selection circuitry is in serviceable condition before installation into the detector. Refurbished OEM-referenced availability also provides the practical solution for MK-5 systems where new OEM power supply card stock is discontinued or available only as part of a complete power supply sub-assembly at a cost disproportionate to a card-level repair.
Direct Fit Replacement Within MK-5 Detector Power Supply Architecture
The 39832-704 card is designed to fit directly within the MK-5 detector’s power supply module without circuit modification or supply rewiring. The card’s PCB form factor, connector configuration, and voltage selection interface are matched to the MK-5 power supply architecture — ensuring that replacement restores the detector’s power supply function to the original manufacturer’s specification without the integration uncertainty that comes with substitute or cross-compatible components sourced without OEM part number confirmation.
Supports Component-Level MK-5 Power Supply Repair and Overhaul
Power supply failures are among the most common causes of complete MK-5 detector outages — and within the power supply module, card-level component failure is frequently the root cause. The availability of the individual 39832-704 power supply select card enables targeted card-level repair of a power supply fault rather than replacement of the entire power supply module or complete detector unit — a significantly more cost-effective maintenance outcome for vessels where multiple MK-5 detection points are installed across main and auxiliary engines.
Technical Specifications
Component: Power Supply Select Card (PCB)
Part Number: 39832-704
Compatible System: Graviner Mark 5 (MK-5) Oil Mist Detector
Manufacturer: Graviner (Kidde / Carrier Global)
Model: MK-5
Description: MK-5 Oil Mist Detector Power Supply Select Card
Category: PCBs
Voltage Selection: 115V / 220V / 230V / 240V at 60Hz
Function: AC supply voltage selection and power supply configuration for MK-5 detector
Condition: Refurbished
Benefits
Restores MK-5 detector power supply function — and with it, the entire crankcase detection system. A failed power supply select card results in complete loss of detector power or incorrect supply conditioning — either way, the MK-5 is non-functional and the vessel’s crankcase explosion protection is offline. Replacing the card with the correct OEM-referenced component restores detector power supply operation and returns the crankcase detection system to fully operational status, typically at a fraction of the cost of power supply module or complete detector replacement.
Multi-voltage capability removes supply compatibility uncertainty for mixed fleets. Fleet operators managing vessels with different electrical supply standards — 115V on some vessels, 220V or 230V on others — benefit directly from the MK-5’s voltage selectability. The 39832-704 card supports all four primary marine AC supply voltages, meaning a single spare card held in fleet stock provides coverage across the entire fleet’s electrical configurations rather than requiring voltage-specific spare cards for each vessel variant.
Card-level replacement avoids the cost of module or unit replacement. MK-5 power supply faults diagnosed at the card level — where the 39832-704 select card is the failed component — can be resolved with card replacement alone, without requiring replacement of the entire power supply module or detector unit. For vessels with multiple MK-5 detection points, the cost difference between a card-level repair and a module or unit replacement is material and repeatable across the life of the installation.
OEM part number supports compliance documentation and spare parts traceability. For vessels operating under ISM Code safety management systems, spare parts records and maintenance documentation must be traceable to the specific components used. The 39832-704 OEM part number provides the component identity reference required for maintenance log entries, class survey documentation, and port state control inspection support — documentation that a generic or substitute part cannot provide.
Refurbished availability where new OEM PCB stock is discontinued or on extended lead time. For MK-5 systems installed 15 to 25 years ago, new OEM power supply card stock is frequently discontinued or only available on extended lead times through official OEM channels. Specialist suppliers with access to inspected refurbished OEM-referenced PCBs provide the practical procurement solution that keeps long-service MK-5 systems powered and operational within the vessel’s maintenance timeline.
Who It’s For
The Ship’s Chief Engineer Diagnosing an MK-5 Complete Power Loss
The MK-5 detector on one of your engine’s detection points has gone completely dark — no display, no response, no alarm acknowledgement. After initial fault isolation, you’ve identified the power supply select card as the likely failed component. You need the correct OEM-referenced replacement — Part No. 39832-704 — confirmed and sourced in time to restore the detector before the vessel’s next departure or upcoming class survey. You need a supplier who can confirm the part, provide it in inspected refurbished condition, and support the documentation your vessel’s maintenance records require.
The Technical Superintendent Managing Fleet MK-5 Spare Parts Inventory
You manage spare parts procurement across a fleet of vessels equipped with Graviner Mark 5 detectors. Power supply failures are a known failure mode in ageing MK-5 installations, and you want to hold at least one power supply select card in fleet spare parts stock to avoid extended detector outages when the failure occurs — as it inevitably will on systems 15 to 20 years into service. The 39832-704 card’s multi-voltage coverage across 115V, 220V, 230V, and 240V means a single card in stock covers the power supply select card requirement for all vessels in your fleet regardless of their individual electrical specifications.
The Marine Equipment Service Engineer Carrying Out MK-5 Power Supply Repairs
You carry out Graviner Mark 5 detector fault diagnosis and repair for vessel operators under service contract. Power supply card failures are a regular presentation in ageing MK-5 systems, and you need a reliable source of OEM-referenced 39832-704 cards in refurbished condition to maintain your service stock and turn around power supply repairs within your clients’ operational timelines. You need a supplier who understands the MK-5 PCB range, can confirm part compatibility with the specific detector variant in question, and provides the component documentation your service records require.
Possible Applications
- Bulk carriers and general cargo vessels — Power supply select card replacement to restore complete MK-5 detector power loss on vessels with medium-speed diesel main engines across varying AC supply standards
- Tankers and chemical carriers — MK-5 power supply PCB repair to restore crankcase detection system operation on vessels where extended detector outage has compliance implications under class and flag state requirements
- Container ships and ro-ro vessels — Card-level power supply repair during port calls or scheduled maintenance periods to restore detector operation without the lead time of complete module or unit replacement
- Mixed-fleet management operations — Single spare card procurement providing multi-voltage coverage across fleet vessels with different electrical supply standards — 115V, 220V, 230V, and 240V
- Offshore support vessels and PSVs — Emergency power supply card sourcing for MK-5 detectors on offshore vessels operating in locations where standard OEM supply channels cannot meet the vessel’s operational timeline
- Drydock and ship repair facilities — Power supply PCB replacement and electrical overhaul of MK-5 detector units during class renewal surveys and scheduled drydocking
- Marine safety equipment service contractors — Power supply card stock maintenance for MK-5 fault diagnosis and repair contracts across Singapore and the regional market
Trust and Certifications
Graviner Mark 5 — The Industry Reference for Marine Crankcase Oil Mist Detection
The Graviner Mark 5 is the most widely deployed crankcase oil mist detection system in the global marine fleet, with type approvals from all major classification societies including Lloyd’s Register, DNV, Bureau Veritas, American Bureau of Shipping, and ClassNK. Maintaining the MK-5 with OEM-referenced components — including power supply PCBs such as the 39832-704 select card — preserves the detector’s type-approved operational specification and the vessel’s compliance with its class society’s crankcase protection requirements. A detector restored to operation using confirmed OEM-referenced components carries the same documentary standing as original factory configuration for maintenance record and survey purposes.
Refurbished and Inspected — Condition Assessed Before Supply
The power supply select card is supplied in refurbished condition, inspected and assessed before supply. For a power supply PCB within a crankcase safety detection system, pre-supply condition assessment provides the procurement assurance appropriate for a component that directly governs whether the detector receives correct operating power. The refurbished condition designation also reflects the practical supply chain reality for mature MK-5 variants — individual power supply PCBs are frequently unavailable as new OEM stock, and refurbished OEM-referenced cards sourced through specialist marine safety equipment suppliers represent the most reliable procurement option for long-service MK-5 installations.
Supplied by Alright Engineering Solutions
The Graviner Mark 5 Power Supply Select Card (Part No. 39832-704) is supplied through Alright Engineering Solutions Pte. Ltd., a Singapore-based specialist supplier of marine safety and gas detection equipment and spare components. Alright Engineering Solutions supports vessel operators, ship management companies, and marine service contractors with MK-5 spare parts sourcing, procurement assistance, and component availability enquiries across Singapore and the regional market.
Accessories and Variants
Additional Graviner Mark 5 PCB and Electronic Spare Components
Alright Engineering Solutions can assist with sourcing additional Graviner Mark 5 PCB and electronic spare components — alarm relay boards, control PCBs, display boards, and associated MK-5 electrical spare parts — for component-level detector repair and fleet spare parts provisioning. Contact our team with your MK-5 PCB requirements and part references for availability confirmation and quotation.
Related MK-5 Spare Components Available from Alright Engineering Solutions
Graviner Mark 5 Toroid (Part No. 44211-115) — Refurbished replacement inductive signal processing component for MK-5 detection circuit
Graviner Mark 5 Photocell Housing (Part No. 45626-122) — Refurbished replacement optical assembly enclosure for MK-5 detector units
Graviner Mark 5 Locating Spigot (Part No. 23617-403) — Refurbished replacement precision locating component for MK-5 detector assembly alignment
Graviner Mark 5 Detector Head — Replacement detector head units for MK-5 crankcase oil mist detection systems
RX-8700 Portable Gas Detector — ATEX/IECEx/MED-certified portable multi-gas monitor for marine engine room and confined space applications
Get in Touch
If you need to source the Graviner Mark 5 Power Supply Select Card (Part No. 39832-704) for a detector power supply repair, planned overhaul, or fleet spare parts programme — contact Alright Engineering Solutions to confirm availability and request a formal quotation.
Our team can also assist with sourcing a complete list of Graviner Mark 5 PCB and electronic spare components for systematic detector repair and overhaul programmes across single vessels or managed fleets.
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