Accurate tank level measurement is a critical requirement across the marine industry, particularly when monitoring cargo tanks. Beyond inventory control, modern tank level gauging systems play a vital role in process safety, regulatory compliance and operational efficiency by providing reliable monitoring of all shipboard service and ballast water tanks.
In this guide, we explore the key technologies used in tank level gauging, the factors vessel operators should consider when selecting a solution, and how Scanjet PSM supports customers throughout the entire project, from selection and delivery to installation, commissioning and aftersales support.
Why Tank Level Gauging Matters
Effective level measurement systems deliver a range of operational and safety benefits, including:
- Improved operational efficiency through optimised storage utilisation and reduced losses
- Enhanced safety by preventing overfills, spills and hazardous incidents
- Compliance with industry standards and regulations, such as API 2350 and IEC 61511
- Accurate inventory management for operational and financial reporting
Failures in level measurement can result in costly downtime, environmental damage and increased safety risks. Selecting the right tank gauging solution is therefore an important operational decision, rather than simply a technical requirement.
Core Technologies Used in Modern Tank Gauging
A variety of technologies are available to suit different tank types, products and operating conditions.
- Non-Contact Radar Level Measurement
Radar systems are widely recognised as the preferred solution for cargo tank applications.
Key benefits include:
- High accuracy, typically within ±2 mm
- Reliable performance in varying vapour, temperature and pressure conditions
- Minimal maintenance requirements
These systems are particularly well suited to cargo storage tanks, hazardous environments and high-value products where measurement accuracy is critical.
- Guided Wave Radar (GWR)
Guided Wave Radar is ideal for challenging conditions such as foam or turbulence.
Benefits include:
- Stable and reliable readings in difficult process conditions
- Suitability for smaller vessels and interface measurement applications
- Ultrasonic Systems
Ultrasonic technology offers an economical, non-contact measurement solution for less demanding applications and environments.
While cost-effective, performance can be influenced by environmental factors such as temperature fluctuations and vapour presence, making these systems more suitable for non-critical applications.
- Hydrostatic (Pressure-Based) Measurement
Hydrostatic pressure measurement remains a proven and cost-effective solution for shipboard service and ballast tanks
Key advantages include:
- Simple installation
- Corrosion-resistant material options
- Also employed for cargo tank overpressure and manifold pressure monitoring
- Self-Powered Gauges and Sight Glasses
Traditional technologies such as self-powered gauges and sight glasses continue to provide reliable local or secondary level indication.
Their advantages include:
- Proven reliability
- Simple operation
- Independent, self-powered functionality
Scanjet PSM: Built for Purpose
At Scanjet PSM, our solutions are engineered with a clear focus on performance, safety and system reliability, making them ideally suited to the demanding conditions of the marine environment.
Key Differentiators included with our standard products
- Installation and Operational Benefits
- Digital network architecture, helping to significantly reduce installation time and cost
- Scalable solutions suitable for vessels of all sizes, with multiple display options tailored to operator requirements
- Interchangeable programmable transmitters simplify spare part management, while built-in diagnostics support maintenance and calibration checks
- Certification
- ATEX / IECEx / UKEx included
- Safe operation in hazardous and explosive environments
- Marine Society Type Approval included
- System Integration
- Seamless connectivity with vessel Alarm Monitoring Systems (AMS), loading computers and platform management systems
- Supports industry-standard Modbus communication protocol
- Lifecycle Support
- System design and application support
- Commissioning and calibration services
- Ongoing technical and aftersales support
Looking for More Guidance?
Choosing the right tank level measurement system is critical for safety, compliance and operational performance. For a more detailed overview of the key considerations, technologies and best practices involved in specifying a tank gauging system, download our Top 10 Guide to Tank Level Measurement and discover the factors every vessel operator should consider before making a decision.
