Level Ultrasonic Sensor: Working Principle, Types & Industrial Applications
Level Ultrasonic Sensor Overview A level ultrasonic sensor is a non-contact device used to measure liquid or solid levels...
- Schedule. Mon - Sat 09.00 - 20.00
Magnetic Level Sensor-Oil Gas Storage Tank
Magnetic level gauge is a robust and reliable solution for continuous liquid level measurement in safety-critical and process control applications. Designed for harsh industrial environments, it provides clear visual indication and stable signal output without being affected by the physical or chemical properties of the medium, such as conductivity, dielectric constant, foam, or vapor.
Based on a proven magnetic coupling principle, the magnetic level gauge ensures accurate level monitoring for corrosive, toxic, flammable, or high-temperature liquids. It supports both single-phase level measurement and interface measurement of two liquids with different densities, making it suitable for complex industrial processes.
As a long-term partner in industrial measurement and control, Instrava supplies magnetic level gauges as part of complete level measurement solutions. By combining reliable products, flexible OEM / ODM capabilities, and close technical collaboration, we help customers improve process safety, operational efficiency, and system reliability. Instrava works closely with customers and OEM partners to deliver long-lasting magnetic level solutions tailored to real operating conditions.
Level Measuring Instruments Description
Magnetic Level-Features
Simple and robust design: The level indicator magnetic type features a straightforward structure, ensuring high stability, reliability, and long-term operation in industrial applications.
Medium-independent performance: Accurate measurement regardless of the liquid’s physical or chemical properties, including conductivity, dielectric constant, foam, or viscosity.
Suitable for harsh environments: Compatible with corrosive, toxic, and explosive media, providing safe and maintenance-free level monitoring.
Dual-medium interface measurement: Capable of measuring the interface or level of two liquids with different densities, ideal for chemical and petrochemical processes.
Flexible display and output: Supports two-wire 4–20 mA DC signal output and optional LED digital displays (0.56″ or 0.8″), enabling easy integration with control systems and remote monitoring.
Level Magnetic-Applications
Magnetic level gauges are widely used across diverse industrial settings, providing accurate and reliable liquid level monitoring:
Steam and hot water boilers, ensuring safe and precise water level control.
Wastewater treatment systems, offering corrosion-resistant and maintenance-free monitoring.
Filling and unloading containers in chemical, pharmaceutical, and food industries.
Chemical and petrochemical storage tanks, capable of handling corrosive and hazardous liquids.
Petroleum and petroleum product tanks, maintaining safe and accurate level measurement.
Oil-fired boilers and diesel fuel tanks, supporting energy and power generation facilities.
Generator sets and auxiliary fuel storage, ensuring reliable operation in remote or industrial sites.
Marine and aerospace fuel tanks, including submarines, helicopters, and ships, where space-efficient and safe level measurement is critical.
Magnetic Level Gauge-Measuring Principle
The magnetic level gauge consists of a measuring body, dual-colored display cylinder, scale, top and bottom flanges, magnetic float, and optional 4–20 mA transmitter. Based on the buoyancy principle, the magnetic float rises or falls with the liquid level, causing the dual-colored display cylinder to rotate and visually indicate the liquid level.
Each display cylinder features a two-color, axisymmetric design with a 10 mm distance between cylinders: the red side represents liquid, while the white side represents air. In addition to standard liquid level measurement, the magnetic level gauge can also accurately measure the interface between two liquids of different densities, making it ideal for chemical, petrochemical, and industrial applications.
Magnetic Levels-Product Structure
The magnetic level gauge features a modular and durable structure designed for reliable liquid level measurement in industrial environments. Its main components include:
Measuring Body: Houses the magnetic float and provides the chamber for the liquid, built from corrosion-resistant materials such as stainless steel or carbon steel with optional PTFE lining.
Magnetic Float: Moves with the liquid level based on buoyancy, transmitting the position to the external indicator via magnetic coupling.
Dual-Colored Display Cylinder: Shows liquid (red) and air (white) levels with a clear, axisymmetric design, enabling intuitive visual reading.
Scale/Ruler: Provides precise reference for manual level reading.
Top and Bottom Flanges: Allow secure mounting to tanks or vessels, ensuring leak-free operation.
Optional Transmitter (4–20 mA): Converts liquid level changes into electrical signals for remote monitoring and integration with control systems.
This structure ensures that the magnetic level gauge operates reliably in harsh conditions, supports interface measurement between different liquids, and provides maintenance-free, long-term level monitoring.
Level Measuring Instruments Parameter
| Measuring Range | 150~6000mm(Over 6M, customization is available) |
| Working Pressure | PN2.5~PN160 (x 0.1MPa) |
| Working Temperature | -190 ~ +425 °C |
| Connection Method | DN80-DN250/RF/14(according to the density of medium) |
| Pressure of Stream | ≤0.6mpa（please note when ＞0.6mpa） |
| Connector of Heating Stream | R1/2″ male thread or customize |
| Communication | 4~20mADC |
| Medium Density | ＞0.45g/cm3 |
| Main Materials | 304,316L,304+PTFE,0Cr18Ni9,00Cr17Ni14Mo2,PP(PP≤1.6mpa, 304+PTFE≤4mpa), or customize |
| Protection Class | IP65 |
| Customized | LED Display and Solar Powered |
Arange 0.15-12m Temperature -190 ~ +425 °C Output signal: 4~20mAdc
Instrava OEM/ODM
Reliable Instruments. Solutions That Fit Your Application.
Instrava is focused on delivering reliable industrial solutions through carefully curated products, application-driven optimization, and flexible customization. We select proven instruments from trusted manufacturers to ensure consistent quality, optimize solutions based on real working conditions to solve practical challenges, and provide tailored configurations to meet specific application needs.
By combining selection expertise with application understanding, Instrava helps customers reduce risk, improve efficiency, and achieve dependable results in complex industrial environments.
Related Product Recommendations
What is a magnetic level gauge and why is it preferred in industrial applications?
A magnetic level gauge is a robust, non-contact level measurement device that uses a float with a magnetic core to indicate liquid levels inside a chamber. The magnetic field actuates an external visual indicator or transmitter, providing accurate, safe, and reliable readings.
Manufacturer advantages:
No direct contact with the measured medium, reducing corrosion and maintenance
Accurate readings under high pressure (up to 40 MPa) and temperature (up to 400°C)
Suitable for hazardous, corrosive, or viscous fluids
Long service life with minimal downtime
Why are magnetic level gauges ideal for oil, chemical, and pharmaceutical industries?
Magnetic level gauges are widely used where precision and safety are critical:
Oil & Gas: Crude oil, LPG, and refined products storage tanks
Chemical: Strong acids, alkalis, and solvent tanks
Pharmaceutical: Process reactors and hygienic tanks compliant with GMP
Example: A chemical plant using a magnetic level gauge for corrosive acid tanks reported zero downtime over 5 years, demonstrating reliability in harsh conditions.
How does a magnetic level gauge compare to radar or ultrasonic gauges?
| Feature | Magnetic Level Gauge | Radar Level Gauge | Ultrasonic Sensor |
|---|---|---|---|
| Contact | Float inside chamber | Non-contact | Non-contact |
| Accuracy | ±1–5 mm | ±1–3 mm | ±5–10 mm |
| Maintenance | Very low | Low | Medium |
| Harsh conditions | Excellent (corrosive, high temp) | Excellent | Limited |
| Visual indication | Yes, mechanical | Optional | No |
Manufacturer note: Magnetic level gauges excel in high-pressure, corrosive, or opaque fluids where radar signals may be less effective.
Can magnetic level gauges handle high-pressure and high-temperature fluids?
Yes. Industrial-grade magnetic level gauges can operate under:
Pressure: Up to 40 MPa
Temperature: Up to 400°C
Hazardous environments: ATEX/IECEx certified options
They are ideal for energy & power plants, chemical reactors, pharmaceutical sterilizers, and HVAC thermal storage tanks.
What industries benefit most from magnetic level gauges?
Energy & Power: Boiler feedwater and condensate tanks
Marine & Shipping: Fuel, ballast, and cargo tanks
Automotive: Coolant, chemical storage, and paint process tanks
Environmental & Mining: Slurry, tailings, and wastewater tanks
HVAC Systems: Chilled water and hot water storage tanks
Manufacturer perspective: Magnetic level gauges are chosen for high reliability, visual verification, and low maintenance in demanding industrial applications.
What factors should be considered when selecting a magnetic level gauge?
Process fluid characteristics: Corrosive, opaque, viscous
Operating conditions: Temperature, pressure, and vibration
Chamber material: Stainless steel, PTFE lining, or alloy for chemical resistance
Indicator type: Flap, column, or transmitter
Certification: ATEX, IECEx, FDA, GMP as required
Correct selection ensures accurate measurement, operator safety, and long-term operational efficiency.
Why Choose Instrava
Built on Consistency, Not Claims
Focused on Industrial Applications
We specialize in industrial analysis and detection, with a clear understanding of real-world operating environments and requirements.
Strict Product Selection Criteria
Every instrument is evaluated based on performance, stability, and application suitability—not just specifications or pricing.
Reliable Supply & Quality Consistency
We work with trusted manufacturers to ensure stable supply, consistent quality, and dependable delivery.
Practical, Experience-Based Support
Our recommendations are grounded in application understanding, helping customers avoid common issues and achieve reliable results.
Instrava is built to reduce uncertainty—so every decision you make is clearer, safer, and more reliable.
The Strategic Role of Industrial Instrumentation in Post-War Reconstruction
Modern warfare has shifted from traditional battlefield confrontations to precision strikes targeting industrial infrastructure, energy systems, and supply chain nodes....
Industrial Instrumentation in Post-Conflict Reconstruction: The Hidden Backbone of National Recovery
When a conflict ends, rebuilding begins—not just cities, but systems. Energy, water, chemical production, and infrastructure must be restored quickly,...