Liquefied Natural Gas (LNG) carrier ships play a vital role in global energy transportation, safely delivering LNG from production terminals to regasification facilities around the world. To guarantee transport efficiency, cargo safety, and accurate billing during custody transfer, LNG carriers rely heavily on LNG Tank Gauging Systems. These systems provide continuous, precise measurement of LNG level, volume, temperature, density, and pressure inside cryogenic storage tanks during marine transport.
How an LNG Tank Gauging System Works
An LNG tank gauging system uses multiple sensors installed inside each cargo tank to collect real-time measurement data. It typically includes:
Primary Level Gauge – Measures LNG liquid height
Secondary Level Gauge – Provides redundant safety measurement
Temperature Sensors – Create temperature profiles across tank depth
Pressure Sensors – Monitor vapor pressure
Density Calculator – Calculates LNG density for mass measurement
Tank Management Unit (TMU) – Centralized control and data monitoring
Data is sent to the Cargo Control Room (CCR) for ship operators to monitor cargo conditions during voyage.
Key Features of Marine LNG Tank Gauging Systems
✅ High accuracy measurement for LNG cargo custody transfer
✅ Redundant level gauging for safety compliance
✅ Designed for membrane and Moss-type LNG tanks
✅ Marine-certified explosion-proof design
✅ Integrated boil-off gas monitoring
✅ Real-time data output for cargo control system
✅ IECEx, ATEX, DNV, ABS and IMO compliant
Applications in LNG Marine Transport
✔ LNG carrier ships
✔ Floating Storage and Regasification Units (FSRU)
✔ LNG bunkering vessels
✔ LNG shuttle tankers
✔ Small-scale LNG transport ships
A reliable LNG Tank Gauging System is essential for safe and accurate LNG transport at sea. It ensures custody transfer accuracy, reduces operational risk, and supports efficient cargo handling under extreme cryogenic conditions. For LNG ship operators and shipbuilders, investing in marine-certified gauging technology is not just a compliance requirement—it is a critical component of safe global LNG operations.