This image shows a magnetic level gauge featuring a clear scale and liquid level display device, suitable for containers that store liquids. The gauge measures liquid level height accurately through the interaction between the external magnetic probe and the internal float.
This image shows a magnetic level gauge, featuring a metal casing and a clear scale for measuring liquid levels. The gauge operates based on the principle of a magnetic float and is commonly used in industrial liquid level monitoring.
This image shows two types of magnetic level gauge switches: non-explosion-proof type and explosion-proof type. The non-explosion-proof type features a simple rectangular design, while the explosion-proof type has a more robust enclosure, suitable for use in hazardous environments.

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.



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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

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.

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.

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.

  • 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.

  • 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.

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