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Overfill Alarm System Spare Parts Suppliers
The "TANK OVERFILL ALARM" legend stencilled on a tanker's cargo control console isn't decorative — under 46 CFR 39.2007 it has to appear in two-inch black letters, and the device behind it has to work every single transfer.
When a float switch sticks, an intrinsically safe barrier blows, or a deck junction box loses its seal, the vessel is one defective sensor away from a regulatory hold or a real spill.
RecordsMarine connects technical superintendents and procurement teams with vetted overfill alarm systems spare parts suppliers who can ship the right components to the right port within usable transit windows.
What the System Is Actually Protecting
A cargo tank overfill arrangement on a tanker is a layered safety architecture, not a single switch. Vessels typically carry a high-level alarm (HLA) that warns the person in charge to slow the loading rate, and a separate high-high level alarm (HHLA) — the overfill alarm proper — that triggers early enough to stop the transfer before the tank tops off.
Both have to be intrinsically safe, both have to be verifiable at the tank before each transfer, and both have to produce a visible and audible signal at the cargo control position and on deck. Chemical tankers, product carriers, VLCCs, bunker barges and FPSOs all run variations of the same logic, and most failures trace back to the same handful of replaceable items: a corroded sensor, a chafed cable, a saturated junction box, a tired alarm horn.
Components to Get from Suppliers of Spare Parts for Overfill Alarm Systems
Reputable suppliers of spare parts for overfill alarm systems carry far more than the headline sensor. The fast-moving items usually include:
- Float-type, capacitive, vibrating-fork and ultrasonic level sensors in the original wetted-material specification
- Intrinsically safe Zener and galvanic isolation barriers, plus replacement fuses
- Junction boxes, gland plates and Ex-d cable glands rated for Zone 0 and Zone 1
- Alarm panels, mimic displays, push-buttons, key switches and lamp modules
- Sounders, xenon beacons and combined horn/strobe units for deck mounting
- Test sockets, simulator plugs and portable test units for pre-transfer verification
- Loop-powered repeaters, relay modules and PCB assemblies for the control cabinet
Cable assemblies and connectors deserve specific attention. Hot deck conditions on tankers age PVC and polyurethane sheaths quickly, and a cracked gland is the most common reason a system fails its annual class function test.
Class Approval and Hazardous Area Certification
Replacement parts for overfill alarms can't be cross-shopped on price alone — every wetted or zone-rated component needs documentation that travels with it. Expect type-approval certificates from ABS, DNV, Lloyd's Register, Bureau Veritas, ClassNK, RINA or KR, plus ATEX or IECEx certification for anything entering Zone 0 or Zone 1. EN 10204 3.1 material certificates apply to sensor housings and wetted parts.
Equally important, the part number on the new component has to match the revision listed in the vessel's approved type-approval drawing — a superseded version can fail a port-state inspection even when the hardware itself is identical.
Brand Coverage Across Providers of Spare Parts for Overfill Alarm Systems
The installed base on commercial tankers is dominated by a relatively narrow group of OEMs, and serious providers of spare parts for overfill alarm systems maintain stock or factory channels for most of them: Scanjet, Musasino, Honeywell Enraf, Emerson Rosemount (TankRadar and 2120-series vibrating forks), Pleiger, Krohne, MMC International, Selma and Hermetic.
Older bulkers and chemical tankers often run legacy systems from manufacturers that have since been acquired or rebranded, and the most useful vendors are the ones who can supply current production parts alongside refurbished or compatible legacy components without forcing a full system upgrade.
Pairing overfill alarm spares with replacement tank level gauge components in one consolidated order is also routine when a vessel is preparing for a class survey.
What Sets a Useful Vendor Apart
Three things matter once the OEM box is ticked. The first is documentation: a vendor who ships parts without matching certificates is creating a paperwork problem the chief engineer will inherit at the next survey.
The second is calibration support — most overfill sensors leave the factory uncalibrated to the specific tank geometry, so a vendor who either coordinates with an onboard calibration service or supplies pre-calibrated units against the vessel's tank tables saves real time alongside.
The third is logistics realism: tanker schedules don't accommodate four-week lead times, and a vendor has to be honest about what is on the shelf versus what is a factory order, and which ports they can actually reach inside a port call.
Sourcing Through RecordsMarine
The distributors of spare parts for overfill alarm systems listed on RecordsMarine cover the major OEM brands, hazardous-area certifications, and the full chain from individual sensor heads up to complete replacement panels. Compare the vendors below by brand coverage, class society approvals, port reach and stock position to shortlist the partner best matched to your fleet's installed equipment and upcoming survey calendar.

Year Founded: 2018
VerifiedCATEGORIES:
Overfill Alarm Systems
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
(190)
CLASS APPROVED:
IACS: ABS, ClassNK, CCS, BV
WAREHOUSES:
China

Year Founded: 2011
VerifiedCATEGORIES:
Overfill Alarm Systems
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
(177)
BRAND:
ALPTEC
Preferred Utilities
Veeder-Root
OilSafeSystem
JME ELLSWORTH
(23)
CLASS APPROVED:
IACS: DNV
WAREHOUSES:
Singapore
United Arab Emirates
Angola
Austria
Australia (209)

Year Founded: 2004
VerifiedCATEGORIES:
Overfill Alarm Systems
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
Air Horns
Air Reservoirs
Air Starters
Alpha Lubrication Systems
Anemometers
(162)
CLASS APPROVED:
IACS: ClassNK, BV

Year Founded: 2025
VerifiedCATEGORIES:
Overfill Alarm Systems
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
Air Horns
Air Reservoirs
Air Starters
Alpha Lubrication Systems
Anemometers
(166)
WAREHOUSES:
Hong Kong

Year Founded: 2020
RM verifiedCATEGORIES:
Overfill Alarm Systems
Air Compressors
Air Driven Motors
Air Horns
Air Starters
Alpha Lubrication Systems
Automation Control Equipment & Control Units
BackWash Filters
Boiler Automation Equipment
Centrifugal Pumps
Control Air Dryers
Cranes
Diesel Generators
Distance Rings & Spacer Rings for Stern Tube
Engine Fuel Injection High Pressure Pipes (2-Strok
(66)
WAREHOUSES:
Turkey
China
Greece
Japan
South Korea (1)

Year Founded: 2021
RM verifiedCATEGORIES:
Overfill Alarm Systems
15 PPM Monitoring Equipment
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Automation Control Equipment & Control Units
Boat Engines
Boiler Automation Equipment
Centrifugal Pumps
Cranes
Electrical Cranes
Electrical Winch & Windlass
Engines (2-Stroke)
Engines (4-Stroke)
FRAMO Systems
(41)
WAREHOUSES:
China

Year Founded: 2010
RM verifiedCATEGORIES:
Overfill Alarm Systems
15 PPM Monitoring Equipment
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
Air Horns
Air Reservoirs
Air Starters
AIS (Automatic Identification Systems)
Alpha Lubrication Systems
AMS (Alarm Monitoring Systems)
Anemometers
Anti-Heeling Systems
ARPA (Automatic Radar Plotting Aids)
(166)
CLASS APPROVED:
IACS: ABS, RINA, ClassNK, CCS, BV, CRS, PRS, KR, LR, DNV, IRS
Non-IACS: RMRS, HRS, Other

Year Founded: 2014
CATEGORIES:
Overfill Alarm Systems
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
Air Horns
Air Reservoirs
Air Starters
Alpha Lubrication Systems
Anemometers
(168)
WAREHOUSES:
Egypt

Year Founded: 1998
CATEGORIES:
Overfill Alarm Systems
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
(161)
CLASS APPROVED:
IACS: ABS, ClassNK, BV, LR, DNV, IRS
WAREHOUSES:
Bangladesh

Year Founded: 2013
CATEGORIES:
Overfill Alarm Systems
15 PPM Monitoring Equipment
AIS (Automatic Identification Systems)
AMS (Alarm Monitoring Systems)
ARPA (Automatic Radar Plotting Aids)
AUS (Automatic Unloading Systems)
Accommodation Ladder Davits
Accomodation Ladders & Gangways
Air Compressors
Air Driven Motors
(172)
CLASS APPROVED:
IACS: DNV
WAREHOUSES:
South Korea