Level Gauge
Precise measurement, overflow safety — real-time monitoring of fuel tank liquid level, temperature, and water level, the critical equipment for safe fuel station operation.
What is a Level Gauge?
A level gauge is a key device used at fuel stations for real-time monitoring of fuel level, temperature, and water level inside storage tanks, an essential component of safe station operation and digital management. Through continuous data acquisition by high-precision magnetostrictive sensors, the level gauge can automatically generate inventory reports, alert on abnormal fuel fluctuations, and prevent leaks and spills.
Zhiming HC-LM Series Smart Level Gauge adopts a 10.1-inch Android touchscreen + magnetostrictive hard-rod probe dual-module architecture, supports RS232/RS485 industrial bus, can connect to audible/visual alarms, printers, and overfill prevention valves, paired with a mobile APP for remote viewing — the standard equipment for smart fuel stations.
Four Product Forms · Covering All Scenarios
Standard / Explosion-Proof Skid-Mounted / Explosion-Proof Type / Vehicle-Mounted — different specifications for skid-mounted stations, construction sites, mining areas, logistics parks, and more.
Standard
10.1-inch color screen · Standard type
- 10.1-inch color capacitive touchscreen
- K10G20 Android system
- RS232 + RS485 industrial bus
- Supports up to 16 fuel tanks
Explosion-Proof Skid-Mounted
8-inch screen · Skid-mounted specific
- Ex ia IIB T4 Ga explosion-proof marking
- 8-inch touchscreen + skid-mounted integration
- CCRI explosion-proof certification
- Ideal for skid-mounted station integrated solutions
Explosion-Proof Type
8-inch screen · Flameproof enclosure
- 8-inch color capacitive touchscreen
- Flameproof enclosure · IP68@10m
- Explosion-proof certificate no. CCRI 24.7759X
- Ideal for high-risk / chemical / oilfield scenarios
Vehicle-Mounted
5-inch screen · Mobile operation
- 5-inch color screen + 4G/WIFI connectivity
- Built-in GPS/BeiDou positioning
- Supports up to 4 fuel tanks
- Ideal for mobile refueling / field operations
Magnetostrictive Working Principle · High-Precision Measurement
A new generation of liquid level measurement sensors developed using the magnetostrictive principle, featuring high accuracy, strong reliability, long life, and stable performance.
Magnetostrictive Linear Displacement Measurement
The magnetostrictive liquid level transmitter mainly consists of three parts: measuring rod, electronic compartment, and magnetic ring (float). The measuring rod contains a magnetostrictive wire (waveguide).
During operation, the electronic compartment's circuit generates a starting pulse that travels along the waveguide, simultaneously creating a rotating magnetic field that progresses along the waveguide. When this magnetic field meets the permanent magnetic field in the float, the magnetostrictive effect is triggered, causing the waveguide to twist and generate a return pulse. The energy pickup mechanism senses this and converts it into a current pulse. By calculating the time difference between the two pulses, the fuel level position is precisely measured.
- Measurement accuracy ±0.5mm · Repeatability ±0.1mm
- Resolution 0.01mm · Dual oil level / water level monitoring
- 5 temperature measurement points · Resolution 0.0625℃
- Upper dead zone 90mm · Lower dead zone 50mm
Probe Shape and Structure
The hard-rod probe features a stainless steel housing with protection rating IP68@10m/8h, resistant to oil, water, and corrosion, with a measurement range of 200mm~7000mm, adaptable to different tank depths.
Technical Parameters
Industrial-grade configuration · built for long-term stable operation in harsh environments.
Hardware Configuration
- LCD Screen
- 10.1-inch capacitive touchscreen (16:9, 800×1280)
- Touch Specification
- 3-point capacitive
- CPU
- A133 / Quad-core A53 / 1.8GHz main frequency
- System Version
- Android 10
- RAM
- 1GB
- Power Supply
- AC220V
- Measured Power Consumption
- ≤ 40W
Environment and Interface
- Operating Temperature
- -10℃ ~ +60℃
- Storage Temperature
- -20℃ ~ +70℃
- Atmospheric Pressure
- 80 ~ 110 kPa
- Interface
- 2×RS-232 + 2×RS-485 + 1×100M Ethernet + WIFI
- Communication Protocol
- 2400 BPS · Even parity · 8 data bits · 1 stop bit
- Max Communication Distance
- 1200m
- Frequency Bands
- China version (China Mobile / Telecom / Unicom) · Global (2G/3G/4G)
Probe Performance
- Measurement Range
- 200mm ~ 7000mm
- Operating Temperature
- -40℃ ~ +60℃
- Operating Current
- ≤ 40mA
- Measurement Accuracy
- ±0.5mm
- Repeatability
- ±0.1mm
- Oil Level / Water Level Resolution
- 0.01mm
- Temperature Measurement Points
- 5 points · Resolution 0.0625℃
Safety and Protection
- Explosion-proof Marking
- Ex ia IIB T4 Ga
- Explosion-proof Certificate No.
- CCRI 24.7759X
- Associated Equipment
- Safety barrier
- Applicable Media
- Gasoline, kerosene, diesel, light oil, heavy oil, alcohol mixtures
- Protection Rating
- IP68 @ 10m, 8h
- Communication Address
- 2-digit number · 02~99
- Backend Protocol
- VR350R (default)
Core Features
From real-time monitoring to intelligent alerts, from multi-tank support to remote viewing — building a complete digital foundation for fuel stations.
Real-time Level + Temperature + Water Level
Magnetostrictive sensor accuracy +/-0.5mm, oil/water level resolution 0.01mm, 5 temperature measurement points, real-time reflection of tank status.
Multi-Tank Management (Up to 16 Tanks)
A single system supports up to 16 fuel tanks. Each tank can switch to detailed data display mode for more comprehensive data. Vehicle-mounted version supports 4 tanks.
Automatic Recording and Report Printing
The system automatically generates leak tests, alarms, fueling, inventory, and shift handover records, which can be printed for archival and traceability.
Account Password and Permission Management
The system has account password protection. Administrators can set account access permissions to ensure system data security and traceable operations.
Mobile Remote Viewing
Supports backend management system and mobile APP, allowing users to check system status anytime, anywhere. Built-in voice alarm and external audible/visual alarm support.
RS485 Bus and WIFI/4G
Probe and level gauge communication adopts RS485 industrial bus, with a maximum transmission distance of 1200m. WIFI and 4G dual connectivity, China/Global version optional.
System Interface Display
8 core function interfaces — Android system with intuitive operation, dual interaction via touchscreen and physical buttons.
Main Interface
Tank visualization: fuel type / level / water level / volume / temperature displayed in real time, multi-tank overview at a glance.
Tank Detail
Full-dimensional data for a single tank: level / water level / volume / weight / empty volume / temperature / alarm / probe address / communication status.
Parameter Settings
12 function entries: probe / tank / tank table / records / data / driver board / DEBUG / baud rate / tank capacity / level / address settings.
Probe Settings
Supports 16 probe address configurations (02~99), probe type HC_MP1, flexibly expanding the number of tanks.
Tank Settings
Tank height / max volume / level / water level / temperature upper and lower limit alarms, fully parameterized configuration.
Fueling Record
Automatically records each truck's fueling: start height / end height / fueled volume / fuel weight, with clear statistics.
Driver Board Management
Overfill valve / high level mode / totals / version management, visualized hardware status.
Tank Table Generation
Auto generates the level-to-volume table based on tank dimensions, full-range accurate calibration.
Backend Control Support
The level system transmits collected data to the backend computer via standard RS232/RS422 interface for more complex data processing.
Open Interface, Protocol Compatible
- RS232 and RS422 industrial interfaces — standard protocols for easy integration with third-party systems
- Supports wireless broadband, data transmission, remote level monitoring — flexible networking
- Provides interfaces and communication protocols for third-party management systems — open ecosystem
- Default protocol VR350R — with the function of reading all probe data, standard and stable
- Supports 4G and WIFI dual connectivity — China version (China Mobile / Telecom / Unicom), Global (2G/3G/4G)
Need Level Gauges for Your Station?
Contact Zhiming Energy for product selection and quotation of level gauges.