Marsen

What Marsen does

Marsen Co., Ltd. (마르센) is a privately-held Korean marine instrumentation manufacturer founded in 2004 and headquartered at 5 SaeJinmok-gil, Gangseo-gu, Busan. The company designs, manufactures, and sells monitoring, control, and safety equipment for ships and offshore plants across four product families — Level, Environment, Control, and Others. Its Control line anchors the business with eight SKUs covering regulatory-mandated safety systems (Water Ingress Alarm WIA-3000, De-watering WIP-2000, Bilge Alarm BOA-2000, Bridge Navigation Watch Alarm WATCH-2000, Valve Controller V-CON, Viscometer VIS-200, Mass Flowmeter CMF-200, Salinity Meter SAL-200, Oil Mist Detector OMD-200), supplemented by electro-hydraulic power packs, temperature and pressure calibrators, differential pressure transmitters, averaging pitot tubes, and ATEX/IECEx-style Ex-proof instruments (HAS12, HAP12, DAC420, DMB-207+). All major products are certified to international maritime standards (SOLAS, IMO, IACS, OCIMF, CCS), with explosion-proof ratings for hazardous-area service on oil tankers and LPG/LNG carriers.

The firm's revenue model is B2B hardware sales into new-build shipyards and retrofit/aftermarket ship operators. Go-to-market combines three internal technical-sales teams (Shipping Companies; Shipbuilding & Overseas; Domestic Spare Parts) with a global channel of 17 agents across 12 countries, anchored by a Singapore branch (Dune Shipping Pte Ltd). Distribution is concentrated in major shipbuilding clusters — China, South Korea, Japan-linked markets (Taiwan, Singapore, Indonesia), India, Middle East (UAE/Oman/Qatar/Bahrain), Vietnam, Turkey, Greece, Netherlands, Spain, USA, Panama, and Peru. Marketing relies on exhibition presence (KORMARINE 2017 and 2023, BARI-SHIP 2017, Vietnam exhibitions) and structured agent training (most recently a 3-day program in November 2025).

Marsen employs 51-100 people, is led by President Kim Kyung-Su, and is founder-controlled with no disclosed external investment, parent entity, or M&A activity. No revenue, funding rounds, or ownership transactions are publicly disclosed. The company maintains ex-proof product certifications (Ex d IIC T4, Ex ia IIC T6, IP68) and a Chinese CCS Type Approval (2013) covering cargo monitoring, liquid-level alarm, and vapour-emission control systems.

Name

Marsen

Legal name

Marsen Co., Ltd.

Website

https://marsen.co.kr

Company type

Private

Founded year

2004

Operating status

Operating

Headcount range

51–100 employees

Short description

Marsen is a privately-held Korean marine instrumentation manufacturer (founded 2004, Busan) that designs and sells regulatory-certified monitoring, control, and safety systems for ships and offshore plants, serving shipyards, shipping companies, and ship operators through direct sales and a 17-agent network spanning 12 countries.

Ownership category

akta.pro rank

Headquarters

HQ city

Busan

HQ country

South Korea

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Technology or R&D, Supply Chain, Operations, Marketing or Sales

Revenue model

1. Ship Equipment Manufacturing and R&D: Marsen generates revenue through manufacturing and selling marine equipment and monitoring systems to shipyards, shipping companies, and shipbuilding equipment companies. The company operates as a technology-intensive R&D company producing level, environment, control, and other marine instrumentation products.

Go-to-market motion3 records

Distribution channels2 records

Marketing channels4 records

Core offering

Marsen develops, manufactures, and sells marine measurement, monitoring, control, and safety equipment for ships and offshore plants. Its portfolio spans water ingress and bilge alarm systems, bridge navigation watch alarms, automatic valve controllers, viscometers, mass flow meters, salinity meters, oil mist detectors, calibration instruments, and explosion-proof components, all compliant with SOLAS, IMO, IACS, OCIMF, and CCS standards. The company sells primarily to shipyards, shipping companies, and ship operators through direct sales teams and a global agent network across 12 countries.

Product overview

Marsen is a marine technology company established in 2004, specializing in ship and offshore equipment for the global maritime industry. The company's product portfolio consists of four main categories: (1) Level - cargo level, temperature and pressure monitoring systems; (2) Environment - environmental monitoring solutions; (3) Control - alarm systems (water ingress, bilge, bridge watch), monitoring instruments (viscosity, mass flow, salinity, oil mist), and valve controllers; (4) Others - calibration equipment (temperature/pressure), electro-hydraulic power packs, pressure instruments, and explosion-proof equipment. Products utilize industrial communication protocols including RS232/RS422/RS485, 4-20mA analog signals, and HART protocol for integration with ship systems. The company maintains global operations through a network of agents across 12 countries.

Differentiator

Problem solved

Functional benefit

Products and services

• Water Ingress Alarm System (WIA-3000) Detects water presence in cargo holds, dry spaces, and void spaces on ships, including LPG/LNG carriers. Supports up to 80 measurement points via RS485 communication and complies with SOLAS Reg. XII 12, IMO Res. MSC.145(77), and IACS SCI 180. Sold to shipyards and shipping companies for safety monitoring.
• De-watering System (WIP-2000) Discharges water from dry spaces in the fore of a ship out through the deck. Complies with SOLAS Reg. XII/13 and interlocks with the WIA-3000 system using electric, pneumatic, and hydraulic valves. Used by shipyards and ship operators for compliance and safety.
• Bilge Alarm System (BOA-2000) Monitors bilge well levels in oil tanker pump rooms and triggers audible and visual alarms. Regulated by IMO MSC.67 and OCIMF. Sold to shipyards and tanker operators for pump room high-level alarm compliance.
• Bridge Navigation Watch Alarm System (WATCH-2000) Monitors bridge activity and alerts the master or navigators if the bridge becomes unattended. Conforms to IMO resolution MCS.128(75) and includes a Dead Man Alarm for engine and pump rooms. Sold to shipyards and ship operators for BNWAS compliance.
• Automatic Valve Controller (V-CON) Accepts input signals from pressure, temperature, level, and gas sensors to control pneumatic, electric, and hydraulic valves via open/close signals, with integrated I/P converter. Sold to shipyards and ship operators for automated shipboard valve control.
• Viscometer (VIS-200) Measures and controls viscosity of heavy fuel for marine and diesel engines to optimize burning efficiency and fuel consumption. Sold to shipyards and shipping companies for fuel management.
• Mass Flowmeter (CMF-200) Direct mass flow measurement of fluids using the Coriolis principle, for energy and chemical industry use on ships and offshore plants. Sold to shipyards and ship operators for fluid measurement applications.
• Salinity Meter (SAL-200) Measures salinity of fresh water generator output or boiler feed water, with remote valve control and alarm functions. Sold to shipyards and shipping companies for boiler and water system monitoring.
• Oil Mist Detector (OMD-200) Monitors oil mist in crank chambers, main engines, and hydraulic power packs, activating visual alarms to prevent explosion and fire; can monitor two locations per unit. Sold to shipyards and ship operators for engine room fire prevention.
• Electro-Hydraulic Power Pack (EHP-200) Compact hydraulic actuator controller integrating electric motor, relief valve, check valve, and hydraulic gear pump with RS232/RS422/RS485 communication for multi-drop operation and real-time monitoring; IP68 rated. Sold to shipyards and ship operators for valve actuation.
• Temperature Calibrator (MTC-200) Temperature calibration device with 40–650°C range used in ship temperature calibration and testing departments. Sold to shipyards and ship operators for instrument calibration.

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

17 partnerships are on record, tiered core.

• Dune Shipping Pte Ltd (Singapore)coreChannel Partner/ Reseller/ DistributorSingapore branch office handling regional sales and distribution. Located at BLK624, Senja Road, Singapore with additional address at No.4 Tusa Link.
• Haicheung (China)coreChannel Partner/ Reseller/ DistributorExclusive agent in China located at 8/F, Juyang Tower, No 1200 Pudong Avenue, Shanghai.
• Sunteq Global (Taiwan)coreChannel Partner/ Reseller/ DistributorTaiwan agent handling sales in Taiwan region.
• STX Marine Service (Indonesia)coreChannel Partner/ Reseller/ DistributorIndonesia agent located at Rukan Grand Panglima Polim Kav. 79, Jakarta.
• Protector Marine Services (India)coreChannel Partner/ Reseller/ DistributorIndia agent providing coverage for the Indian market.
• V-Tech Marine Services (UAE)coreChannel Partner/ Reseller/ DistributorAgent covering U.A.E, Oman, Qatar, and Bahrain markets. Located in Ajman, U.A.E.
• Vietnam Hydrocabon InstrumentscoreChannel Partner/ Reseller/ DistributorVietnam agent located at 16 Yen The, Ward 2, Tan Binh District, HCMC.
• TES Industry (Vietnam)coreChannel Partner/ Reseller/ DistributorAdditional Vietnam agent located at No. 20 Lane 93, Group 3, Phu Do Ward, Nam Tu Liem Dist., Hanoi.
• Mono Marine (Turkey)coreChannel Partner/ Reseller/ DistributorTurkey agent located at Cami Mahallesi, İstasyon Cad., NO:106C Tuzla, Istanbul.
• Internaftiki (Greece)coreChannel Partner/ Reseller/ DistributorGreece agent located at 6, Alipedou Str., Piraeus 185 31.
• Strofades (Greece)coreChannel Partner/ Reseller/ DistributorSecond Greece agent located at 2, Aristotelous Str, 24131 Kalamata.
• PB Marine (Netherlands)coreChannel Partner/ Reseller/ DistributorNetherlands agent located at Bohrweg 48, 3208 KR Spijkenisse, The Netherlands.
• Petrik Naval (Spain)coreChannel Partner/ Reseller/ DistributorSpain agent located at Av De Los Empresarios, 20, Los Barrios, Cadiz, Spain.
• Marine BCTEC (USA)coreChannel Partner/ Reseller/ DistributorUSA agent located at 16560 Harbor Blvd., Suite i, Fountain Valley, CA 92708.
• Panamatek (Panama)coreChannel Partner/ Reseller/ DistributorPanama agent located at Owen St. Building 2364, Balboa, Ancon, Panama.
• Talleres Industriales (Panama)coreChannel Partner/ Reseller/ DistributorPanama agent located at Av. Central Cl. 16, Colon.
• Reset Electronica (Peru)coreChannel Partner/ Reseller/ DistributorPeru agent handling sales in the South American market.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Wärtsilä: Wärtsilä is a global marine technology leader offering integrated ship automation, navigation, and safety systems. While much larger and broader than Marsen, it competes across many of the same vessel monitoring, control, and alarm categories and represents the dominant integrated platform that Marsen must interoperate with.
• Endress+Hauser: Endress+Hauser is a global leader in industrial process instrumentation including flow, level, pressure, and analytical measurement. While primarily serving process industries, its marine-grade instrumentation overlaps with Marsen's salinity meter, mass flowmeter, and pressure transmitter product lines.
• Emerson Automation Solutions: Emerson's automation solutions include marine and offshore process instrumentation, valve control, and flow measurement. It competes in the differential pressure transmitter, mass flowmeter, and valve controller categories that overlap with Marsen's offerings.
• ABB Marine & Ports: ABB offers marine automation, electrical, and digital solutions for vessels. It competes in ship automation, alarm and monitoring systems, and integrated bridge systems, with significantly broader global service coverage than Marsen.
• Kongsberg Maritime: Kongsberg Maritime provides automation, navigation, dynamic positioning, and sensor systems for commercial vessels. It competes directly in bridge navigation watch alarm systems, vessel monitoring, and integrated control platforms, and is a key reference point for shipowners evaluating Marsen-class products.
• Yokogawa Electric: Yokogawa supplies industrial automation, control systems, and field instrumentation including flowmeters and pressure transmitters. Its marine and offshore applications overlap with Marsen's measurement and control product portfolio.

Direct peers

• Japan Radio Co. (JRC): JRC manufactures marine navigation equipment, communication systems, and integrated bridge solutions. It competes directly with Marsen in BNWAS, sensor instrumentation, and bridge-side safety systems for the Asian shipbuilding market.
• Tokyo Keiki Inc. Tokyo Keiki produces marine instruments including navigation equipment, flowmeters, and control systems. It competes with Marsen in marine instrumentation categories such as flow, level, and pressure measurement for shipboard applications.
• Sperry Marine (Northrop Grumman): Sperry Marine specializes in marine navigation, bridge systems, and integrated vessel control — overlapping with Marsen's WATCH-2000 BNWAS and broader control product line. It serves similar shipyard and shipowner customers with comparable regulatory-certified products.
• Marine Instruments S.A. Marine Instruments is a specialized manufacturer of marine safety, navigation, and monitoring equipment, serving fishing and commercial vessel segments. It is comparable in scale to Marsen and overlaps in regulatory-certified alarm and monitoring systems for vessels.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key highlights6 records

Customer concentration

Compliance11 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Marsen