LNG Tank Gauging Systems with Redundant Safety and Accuracy Features

As global demand for Liquefied Natural Gas (LNG) continues to grow, the need for precise, reliable, and safe tank gauging systems becomes ever more critical. Whether at large-scale import/export terminals, floating storage units, or peak-shaving plants, accurate LNG tank measurement is essential for inventory control, custody transfer, and operational safety.

To meet these demands, LNG tank gauging systems with redundant safety and accuracy features have become the industry standard—ensuring continuous monitoring and compliance, even in the harshest cryogenic conditions.

Key Redundant Features in Modern LNG Tank Gauging Systems

1. Multiple Level Measurement Technologies

Servo tank gauges and radar level transmitters are often used in combination, providing dual-level measurement. If one fails or drifts, the second sensor ensures continuity and verification.

Redundant measurements help validate custody transfer accuracy, especially when tank stratification may affect level readings.

2. Redundant Temperature Sensing

LNG temperature can vary within the tank. Systems use multiple temperature sensors at various heights to calculate a temperature profile.

Redundant temperature inputs prevent errors in volume correction and density compensation.

3. Independent Pressure Transmitters

Accurate pressure readings are vital for vapor pressure control and boil-off gas management.

Using two or more pressure sensors enhances fail-safe operation and allows for automatic switching in case of fault detection.

4. Backup Data Processing and Communications

Redundant system architecture includes dual processors, failover communication paths, and battery-backed memory, ensuring the system remains operational even during partial hardware or power failures.

5. Integrated Safety Alarms and Interlocks

Gauging systems can be integrated with overfill prevention systems (OPS), sending alarms or even triggering shutdowns if critical levels are reached.

Built-in diagnostics constantly check sensor health and system status, alerting operators to potential issues before they escalate.

Applications in the LNG Supply Chain

Redundant LNG tank gauging systems are used across a wide range of facilities, including:

  • LNG terminals for ship loading/unloading
  • Floating Storage and Regasification Units (FSRUs)
  • LNG peak-shaving facilities
  • Liquefaction plants and storage hubs
  • Offshore LNG platforms and tankers

LNG tank gauging systems with redundant safety and accuracy features are essential for modern energy operations. They provide continuous performance, fault tolerance, and peace of mind, especially when dealing with volatile cryogenic products under tight safety and commercial constraints.