Source marine-certified level transmitters for critical applications like ballast control, fuel management, and bilge monitoring. Ensures safety, compliance, and operational efficiency at sea.
Marine approved liquid level sensors are indispensable instruments designed and rigorously certified to operate reliably within the challenging conditions of ships, offshore platforms, and other maritime installations. These devices provide essential liquid level measurements, converting them into stable electrical signals for integration into vessel control, monitoring, and safety systems. Possessing certifications from recognised marine classification societies confirms their ability to withstand constant vibration, saltwater corrosion, shock, and stringent EMC requirements, ensuring dependable performance in critical applications ranging from ballast and fuel tank gauging to bilge and wastewater monitoring.
Floating dry dock ballast tank 14ft range 4-20mA output submersible seawater level sensor - 14ft range submersible level sensor for monitoring the level of seawater in floating dry dock ballast tanks.
Screw-in 2m height onboard marine vessel diesel tank base mount level sensor - Monitor fuel levels in marine diesel tanks with the DMK 458 hydrostatic level sensor. Marine-approved and designed for viscous fluids.
- LMK458 Marine Approved Hydrostatic Level Transmitter
- DMK 458 Seawater Low Range Pressure Transmitter
LMK 487 Submersible Ballast Tank and Draught Level Pressure Transmitter
LMK457 Marine Approved Level Transmitter
- Desalination plant feed tank submersible level sensor - Highly durable submersible level sensor designed for harsh desalination plant environments. Copper-nickel alloy housing and ceramic diaphragm ensure long-term reliability in aggressive saline conditions. 4-20mA output, 0-5mH2O range.
- 5 barg range 4-20mA output submersible seawater pressure sensor for measuring sea level
- DNV / GL marine certified submersible seawater level transmitter for 0-3 metre depth
- 20 foot deep submersible salt water level transmitter for marine use
- Hydrophone array submersible 200 meter seawater depth sensor
- 6m deep ballast tank level transmitter with marine certificate
- 9m 4-20mA ship fish storage seawater storage tank submersible level sensor
- Rangeable fuel and freshwater submersible level sensor for ship tanks up to 1.6m high
- 100 meter IP68 sea water level transmitter with Marine & ATEX approval
- Ferry hull draft monitoring 3 bar absolute 4-20mA output seawater pressure sensor
Find out more about Marine Approved Liquid Level Sensors to determine which product options and capabilities will best meet your application requirements.
Marine approved liquid level sensors are specifically engineered and certified to meet the demanding conditions and stringent regulatory requirements encountered in maritime environments. Obtaining certification from recognized classification societies such as DNV, ABS, Lloyd’s Register, Bureau Veritas, or RINA is paramount, signifying that the sensor has undergone rigorous testing to withstand the unique challenges of shipboard and offshore installations. These challenges include constant vibration, mechanical shock from wave impacts, exposure to corrosive saline atmospheres, wide temperature fluctuations, and stringent electromagnetic compatibility (EMC) requirements to prevent interference with sensitive navigation and communication equipment.
The necessity for marine certification stems directly from the critical nature of the applications these sensors serve and the harsh operating environment. Reliability is non-negotiable, as failures can impact vessel stability, operational efficiency, safety, and environmental compliance. Consequently, these sensors often feature robust construction, typically utilizing materials like 316L stainless steel, Duplex stainless steel, or even Titanium for wetted parts to resist corrosion from seawater, fuels, or various waste liquids. Housing designs prioritize high ingress protection ratings (e.g., IP67, IP68) to prevent water intrusion, and internal electronics are potted or conformally coated for enhanced protection against moisture and vibration.
Specific sensor technologies are selected based on the application demands within the marine context. Submersible hydrostatic pressure transmitters are commonly employed for tank gauging in ballast tanks, fuel tanks, and service tanks due to their simplicity, reliability, and ability to be installed directly within the liquid.
Integration into ship automation and control systems (e.g., Integrated Automation Systems (IAS), Alarm Monitoring Systems (AMS), Distributed Control Systems (DCS), SCADA) is facilitated through standard industrial output signals. While 4-20mA analogue outputs remain common, digital communication protocols like HART, Modbus RTU, or fieldbus options such as Profibus PA are increasingly specified for enhanced diagnostics, remote configuration, and simpler wiring architectures on complex installations. Intrinsic safety (Ex i) or explosion-proof (Ex d) certifications are often required in conjunction with marine approval for sensors installed in hazardous areas, such as fuel tanks or adjacent spaces.
Applications for marine-certified level sensors are diverse and critical for vessel operation and safety. Accurate measurement in seawater ballast tanks is essential for maintaining vessel trim, stability calculations, and managing stress on the hull. Bilge water monitoring requires robust sensors capable of handling oily water mixtures and detecting low levels to trigger pumping operations and prevent pollution. Level monitoring in tanks containing fuel (MGO, HFO, LNG) is crucial for consumption tracking, bunkering operations, and ensuring sufficient fuel reserves; high accuracy and reliability are vital here. Other key applications include monitoring levels in freshwater tanks, sewage holding tanks, greywater tanks, sludge tanks, lubricating oil tanks, and hydraulic oil reservoirs. On offshore oil and gas platforms, similar sensors are used for process vessels, storage tanks, and utility systems, facing equally harsh conditions. A specialized application involves measuring external sea level, often used to control the operation of seawater abstraction pumps for cooling systems or ballast intake, ensuring pumps only run when sufficiently submerged.