The top mount grey water level gauge HB-SPCG-150S-C is engineered for direct installation on marine tanks, specifically addressing safety and operational needs of maritime professionals managing fluid levels aboard vessels. This marine tank level indicator operates solely through the hydrostatic pressure exerted by the liquid in the tank, eliminating dependence on electrical power sources. As a result, it offers intrinsic safety suitable for environments with flammable or sealed liquids. Designed for end-users such as ship engineers and fleet maintenance teams, this solution simplifies level measurement tasks while complying with stringent maritime safety protocols. The robust stainless steel sensing diaphragm mounted atop the tank ensures reliable pressure transfer to its mechanical dial gauge.
This marine liquid level gauge supplier offers a device equipped with a 150 mm dial providing dual-scale readouts for both liquid level and pressure. The gauge incorporates specialized features such as corrosion-resistant stainless steel capsules, an anti-extrusion capillary tube, and factory calibration certificates to guarantee precision. Capable of measuring tank depths up to nearly 4 meters, it accommodates different specific gravities, adapting calibration for grey water, fresh water, or oil applications. Additionally, the dial can include a custom high-level warning mark, facilitating proactive operational management. Its self-powered, explosion-proof design and vibration resistance enable consistent performance in demanding marine environments requiring reliable, maintenance-minimal instrumentation.
Widely implemented in the shipping and marine industries, the top mount grey water level gauge serves critical roles in monitoring grey water, fresh water, oil, and ballast tanks on cargo ships, yachts, and workboats. The marine tank level indicator is designed to meet the needs of highly regulated environments where explosion-proof instruments are mandatory, particularly for enclosed liquid reservoirs. Its compatibility with top mount installations allows integration with existing tank infrastructure, supporting operational workflows such as bunkering and sewage management. As a marine liquid level gauge supplier, our company ensures that the product’s mechanical reliability and adaptability enhance both safety compliance and measurement accuracy critical to maritime logistics and vessel maintenance.
Technical Specifications
Dial Diameter: 150mm
Mounting Type: Top mount (S = Top installation)
Tank Depth Customized: Max 3908mm (customizable)
Medium Specific Gravity: S.G=1.0 (grey water/fresh water, S.G adjustable for oil)
Measuring Range: 0~14m liquid column; pressure scale 0~0.196MPa
Warning Mark: Custom high-level red warning line (10.76m standard)
Capillary Tube: Custom length, anti-extrusion, anti-kink sealed pressure transmission hose
Sensing Diaphragm Box: Stainless steel pressure sensing capsule, corrosion-resistant
Working Principle: Hydrostatic pressure mechanical transmission
Calibration Date: Factory calibrated, with inspection certificate
Certificate: Factory quality certificate, meets marine standard
Product Structure Composition
Top-mounted stainless steel sensing capsule: Install on tank top to collect liquid static pressure
Sealed capillary pressure transfer hose: Transmit pressure signal remotely
150mm large-size dial indicator: On-site real-time level display
Main Advantages
1. Self-powered & Explosion-proof
No power supply, no electronic components, intrinsically safe, suitable for flammable liquid tanks (fuel oil, lube oil) and closed sewage tanks.
2. Top Mount Installation
Only need opening on tank top, no side wall drilling, perfect for underground, fully enclosed marine tanks.
3. Dual Scale Clear Reading
Integrated liquid level meter, pressure gauge & tank volume scale; custom high-water warning red line for easy operator observation.
4. Marine Heavy-Duty Structure
Shock-resistant, temperature-resistant, anti-vibration design, stable performance under ship sway & bump conditions.
5. Fully Customizable
Adjustable tank depth, medium specific gravity, capillary length, dial scale & warning line according to client tank parameters.
6. Low Maintenance
Zero electronic failure risk, long service life, simple regular inspection only.
Designed for Integration and Durability in Harsh Marine Conditions
This top mount grey water level gauge features a compact structure requiring only a single tank-top opening for installation, optimizing tank integrity. Its stainless steel sensing diaphragm and sealed capillary tube deliver enhanced corrosion and vibration resistance, engineered for long-term stability in aggressive marine atmospheres. The modular design permits customization of tank depth, liquid specific gravity, and tube length, enabling flexible integration across a broad range of vessel types and tank configurations. As a marine tank level indicator, it complies with explosion-proof standards to ensure intrinsic safety where electrical instrumentation is not feasible. These design advantages reduce installation complexity and support system-wide compatibility for maritime operators.
Reliable Performance Delivering Accurate, Maintenance-Friendly Operation
The marine liquid level gauge supplier prioritizes accuracy and ease of use by employing a purely mechanical, self-powered operation that requires no external electricity, eliminating risks associated with electrical failures. Its 150mm dial enables quick visual assessment of liquid levels and pressures, including customizable warning markers for enhanced operational control. The fully factory-calibrated unit comes with inspection certification, minimizing onsite adjustments and maintenance requirements. This robustness ensures that ship engineers and maintenance personnel can rely on the gauge for continuous monitoring without frequent intervention, ultimately improving operational efficiency and safety on diverse marine vessels.
Working Principle
Hydrostatic pressure generation: The liquid height inside the tank generates static pressure, acting vertically on the stainless steel sensing diaphragm box installed on the tank top.
Formula: P=ρgh ,P=static pressure, ρ=medium density, g=gravity acceleration, h=liquid level height.
Pressure transmission: The sealed capillary hose is fully filled with incompressible pressure-transfer liquid, transmitting pressure losslessly from the diaphragm box to the dial gauge.
Mechanical display: The internal Bourdon tube inside the dial deforms under transmitted pressure. The deformation is amplified by linkage gear mechanism to drive the pointer.
Dual-scale reading: The dial is pre-calibrated with liquid level (meter) & pressure (MPa) scales, with tank volume reading and high-level alarm line for direct on-site reading.
Self-powered advantage: Pure mechanical structure without any electrical parts, driven only by liquid static pressure, no electricity needed.
Application Scenarios
Marine Industry
Grey water tank, black water sewage tank, fresh water tank, domestic water tank, diesel oil tank, lube oil tank, ballast auxiliary tank of cargo ships, yachts, engineering vessels, work boats.
Land Industry
Underground water storage tank, atmospheric chemical storage tank, fuel storage tank, factory sewage tank.
Grey Water Tank Monitoring in Commercial Shipping Operations
Within commercial shipping environments, managing grey water discharge from onboard facilities necessitates accurate, resilient level measurement solutions. The top mount grey water level gauge plays a critical role by providing explosion-proof, mechanical level indication directly from the tank top, suitable for both small and large vessels. Its intrinsic safety design and corrosion-resistant components comply with maritime pollution control regulations and reduce risks associated with electrical instrumentation in damp or volatile conditions. Integrated into vessel monitoring systems, this marine tank level indicator offers operators reliable data to optimize tank usage and scheduling of discharge or treatment procedures, ensuring compliance with international maritime environmental standards.
Oil Tank Level Measurement during Marine Fuel Management
In marine fuel management operations, such as bunkering or lube oil transfers, continuous and accurate level measurement of tank contents is essential. The top mount grey water level gauge provides a mechanical, explosion-proof method for tracking oil volumes within storage tanks, adaptable via calibration for different oil specific gravities. This marine liquid level gauge supplier’s product ensures safe use in hazardous environments and supports operational workflows by facilitating real-time fluid level monitoring without electrical dependencies. Its robust design withstands vibration and shock typical to marine transport, integrating seamlessly with shipboard safety systems to enhance fuel management accuracy and reduce operational risks linked to level misreadings.
Installation & Maintenance Guide
Installation Notes
Fix the sensing diaphragm box horizontally at the highest point of tank top to ensure full contact with liquid static pressure.
Avoid sharp bending or squeezing capillary tube; bending radius ≥10cm to prevent internal pressure liquid blockage.
Mount dial gauge on walkway or pump room wall for convenient daily inspection.
Maintenance Tips
Check capillary tube regularly for damage, crack or extrusion deformation.
If reading deviation occurs after long-term operation, send back for diaphragm & dial recalibration.
Keep dial surface clean, avoid long-term corrosion by salt spray & sewage.
