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...
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Magnetostrictive Level Sensor
The Magnetostrictive Level Gauge is a high-precision solution designed for continuous liquid level and interface measurement in demanding industrial environments. Based on proven magnetostrictive technology, it delivers stable, repeatable and highly accurate measurement results over long-term operation.
This level gauge is particularly suitable for storage tanks, pressure vessels and process applications where reliable level data is critical for safety, inventory management and process control. By directly measuring the position of the magnetic float through time-of-flight detection along the waveguide, the system provides real-time level information that is unaffected by changes in temperature, pressure, density or electrical properties of the medium.
With its robust mechanical structure and flexible configuration options, the magnetostrictive level gauge supports both single liquid level and oil–water interface measurement in the same tank. Multiple output signals and communication protocols allow seamless integration into DCS, PLC and SCADA systems, making it an ideal choice for modern industrial automation.
Designed from a manufacturer’s perspective, the instrument can be customized in measuring length, materials, process connections and signal outputs to match specific application requirements. It is widely applied in oil & gas, chemical, petrochemical, power and tank farm systems where accuracy, reliability and long service life are essential.
Level Measuring Instruments Description
Magnetostrictive Level Sensor-Features
High-accuracy and high-repeatability measurement ensures stable and reliable long-term performance.
Supports multiple output signals and communication protocols for seamless system integration.
Zero and span adjustable across 100% of the measuring range for easy commissioning.
Advanced anti-RF interference and lightning protection design for harsh industrial environments.
Maintenance-free operation with no periodic calibration required.
Rigid probe structure provides excellent pressure resistance for demanding process conditions.
Flexible probe option enables ultra-long measuring ranges while simplifying transportation and installation.
Corrosion-resistant construction ensures reliable operation in aggressive and corrosive media.
Magnetostrictive Level Gauge Application – Storage Tank Level & Interface Measurement
Magnetostrictive level gauges are widely used for continuous liquid level and interface measurement in storage tanks and process vessels where high accuracy and long-term reliability are required.
In oil & gas, petrochemical and chemical industries, the gauge provides precise monitoring of liquid level and oil–water interface in crude oil tanks, product tanks, and separation vessels. Accurate level data helps prevent overfilling, optimize inventory management, and improve operational safety.
For tank farms and bulk storage systems, the magnetostrictive level gauge supports long measuring ranges and stable performance under varying temperature and pressure conditions. Maintenance-free operation reduces downtime and lowers total cost of ownership, making it a cost-effective solution for large-scale installations.
With flexible probe designs, corrosion-resistant materials, and multiple signal outputs, the instrument can be easily integrated into existing control systems, ensuring reliable operation in both new projects and retrofit applications.
Magnetostrictive Liquid Level Sensor-Working Principle
The transmitter sends a short excitation pulse along the magnetostrictive waveguide.
A magnetic float moves with the liquid level and generates a static magnetic field.
When the pulse reaches the float, a torsional wave is generated at that position.
The torsional wave travels back to the transmitter at a constant speed.
The time difference is calculated to determine the exact liquid level or interface position.
Magnetostrictive Level Sensors-Structure
Electronics Housing
Integrated signal processing and transmitter module for level and interface measurement. Supports standard analog and digital outputs with optional local display. Industrial-grade enclosure suitable for field installation.
Magnetostrictive Waveguide
High-stability waveguide wire for excitation pulse transmission and torsional wave detection. Ensures accurate time-of-flight measurement independent of process temperature, pressure or medium properties.
Measuring Probe
Available in rigid rod or flexible cable design. The rigid probe offers high mechanical strength and pressure resistance, while the flexible probe is suitable for ultra-long measuring ranges and simplified transportation and installation.
Magnetic Float
Free-moving float with built-in permanent magnet. Float size and material are selected according to medium density and process pressure to ensure stable operation and measurement accuracy.
Process Connection
Threaded or flanged mounting options available. Multiple standards and pressure ratings supported to meet different vessel and tank installation requirements.
Electrical Connection
Standard electrical interfaces including M20×1.5, 1/2″ NPT, direct cable outlet, aviation connector or terminal block for reliable field wiring.
Level Measuring Instruments Parameter
| Item | Specification |
|---|---|
| Measuring Range | Rigid type: 50–5000 mmFlexible type: 4000–20000 mm (longer lengths available upon request) |
| Measurement Accuracy (Non-linearity) | < 0.05% F.S.For ranges ≤ 300 mm: up to 150 μm |
| Repeatability | < 0.01% F.S. |
| Resolution | 1 mm standard5 μm (high-precision version) |
| Hysteresis | < 0.01% F.S. |
| Temperature Influence | < 0.007% F.S. / °C |
| Zero Adjustment Range | 100% F.S. |
| Span Adjustment Range | 100% F.S. |
| Float & Probe Material | SS304, SS316, SS304 + PTFE |
| Electronics Housing Material | SS304 or aluminum alloy (with local display and HART option) |
| Process Connection | Threaded or flanged |
| Power Supply | 24 VDC |
| Operating Temperature | –40 to +85 °C |
| Storage Temperature | –40 to +100 °C |
| Nominal Pressure Rating | PN2.5 to PN160 (×0.1 MPa)Up to PN250 available for special applications |
| Output Signal | 4–20 mA DCModbus0–10 V DC / 0–5 V DC (optional) |
| Load Resistance | ≤ 500 Ω |
| Electrical Connection | M20×1.51/2” NPTDirect cable outletAviation connectorTerminal block |
| Applicable Medium Density | ≥ 0.5 g/cm³Lower density available upon request |
| Float Diameter | Ø24–Ø120 mm (selected based on pressure and medium density) |
| Ingress Protection | IP65 |
| Explosion Protection | Ex ia IIC T6 GaEx d IIC T6 Gb |
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.
1. Why should I choose a magnetostrictive level gauge for my process?
It provides highly accurate and stable level measurement, reducing process downtime and minimizing inventory errors. Its long-term reliability ensures a strong return on investment compared with conventional gauges.
2. Can this sensor reduce maintenance costs?
Yes, its non-contact time-of-flight measurement eliminates mechanical wear, requiring no periodic calibration. This significantly lowers maintenance labor and operational costs over the product lifetime.
3. How does customization support my application needs?
OEM/ODM options allow adjustment of probe length, materials, process connections, and outputs. This ensures seamless integration into existing tanks, vessels, and control systems, reducing retrofit costs.
4. Is it compatible with industrial control systems?
Absolutely. The gauge supports 4–20 mA, HART, and Modbus outputs, allowing easy integration with PLC, DCS, and SCADA systems for real-time monitoring and automated control.
5. How durable is the gauge in harsh environments?
Constructed from corrosion-resistant materials with rugged probes, the gauge performs reliably under high pressure, extreme temperatures, and aggressive chemical conditions, ensuring consistent operation and long-term value.
6. How does this gauge improve overall operational efficiency?
Accurate and repeatable measurements reduce overfilling, waste, and downtime. Flexible installation options and long-range probes optimize system layout, making your process safer, more efficient, and cost-effective.
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.
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