SBEM developed the Fuel Water Sensor (FUWS-10 Series), a precision-engineered system consisting of two integrated components:
Primary Converter (Model: FUWS-10-PC)
Detects capacitance changes corresponding to the interface level between fuel and sea water.
Secondary Converter (Model: FUWS-10-SC)
Converts these capacitance variations into relay signals for control system actions while also powering the primary converter.
This advanced system ensures accurate boundary detection, supports real-time relay actuation, and maintains reliable communication with submarine service control systems.
- The Primary Converter (FUWS-10-PC) operates on the principle of capacitance change.
- It functions as a cylindrical capacitor, where the internal electrode is insulated with fluoroplastic and the external shell acts as the screen.
- When the space between the electrodes is filled with fuel (air or oil), the capacitance remains minimal.
- When sea water fills the space, the capacitance increases significantly.
- This variation is detected and sent to the Secondary Converter (FUWS-10-SC).
- The secondary unit converts the capacitance signal into a relay output, which changes state when the electrode senses water or fuel.
- The relay output is then transmitted to the submarine’s control system for indication or automated operation.
Defence-Grade Design
Engineered specifically for submarine applications under highpressure marine environments.
High Accuracy
Maintains ±10 mm alarm accuracy even under long-term immersion.
Pressure Resilience
Operates efficiently at up to 40 kg/cm² medium pressure.
Complete Isolation
Ensures electrical safety between fuel, sea water, and instrument circuitry.
Compact & Durable Build
Constructed using SS316 and aluminium alloy for corrosion resistance and long service life.
Fast Response
Detects interface level changes instantly, enhancing control reliability.
Integrated Power Supply & Relay
Secondary converter also acts as a power and relay unit for simplified system integration.
Fully Sealed Construction
IP67-rated protection ensures durability in humid and submerged environments.
Fuel-Sea Water Interface Detection in submarine fuel systems
Fuel Transfer System Monitoring for tank-to-tank operations
Boundary Detection in Ballast Tanks during pressure equalization
Oil-Water Separation Systems in marine and defence-grade installations
Control Feedback to SECS (Service Equipment Control System) in submarines
Monitoring Distillate and LSHS Diesel Systems
Leak or Intrusion Detection in fuel storage tanks
Underwater Vessel Automation Systems for safe fluid level management
In submarine environments, maintaining the correct boundary between fuel and sea water is crucial for operational safety and efficiency.
Continuous fuel transfer and ballast operations create complex interfaces between nonconductive fuel and conductive sea water.
Detecting this interface accurately under high pressure, varying temperatures, and confined installation conditions is a major challenge for the onboard control system.
SBEM developed the Fuel Water Sensor (FUWS-10 Series), a precision-engineered system consisting of two integrated components:
Primary Converter (Model: FUWS-10-PC)
Detects capacitance changes corresponding to the interface level between fuel and sea water.
Secondary Converter (Model: FUWS-10-SC)
Converts these capacitance variations into relay signals for control system actions while also powering the primary converter.
This advanced system ensures accurate boundary detection, supports real-time relay actuation, and maintains reliable communication with submarine service control systems.
- The Primary Converter (FUWS-10-PC) operates on the principle of capacitance change.
- It functions as a cylindrical capacitor, where the internal electrode is insulated with fluoroplastic and the external shell acts as the screen.
- When the space between the electrodes is filled with fuel (air or oil), the capacitance remains minimal.
- When sea water fills the space, the capacitance increases significantly.
- This variation is detected and sent to the Secondary Converter (FUWS-10-SC).
- The secondary unit converts the capacitance signal into a relay output, which changes state when the electrode senses water or fuel.
- The relay output is then transmitted to the submarine’s control system for indication or automated operation.
Defence-Grade Design
Engineered specifically for submarine applications under highpressure marine environments.
High Accuracy
Maintains ±10 mm alarm accuracy even under long-term immersion.
Pressure Resilience
Operates efficiently at up to 40 kg/cm² medium pressure.
Complete Isolation
Ensures electrical safety between fuel, sea water, and instrument circuitry.
Compact & Durable Build
Constructed using SS316 and aluminium alloy for corrosion resistance and long service life.
Fast Response
Detects interface level changes instantly, enhancing control reliability.
Integrated Power Supply & Relay
Secondary converter also acts as a power and relay unit for simplified system integration.
Fully Sealed Construction
IP67-rated protection ensures durability in humid and submerged environments.
