Technical Innovations and Supply Chain Resilience in Modern Sensing Technologies

In the rapidly evolving world of industrial automation, precision measurement and control are paramount. Traditionally, technologies such as magnetostrictive and magnetic-based sensors have played important roles in detecting position, displacement, and other critical parameters. However, the landscape is shifting: inductive sensors have emerged as a compelling alternative, offering not only technical advantages but also notable supply chain resilience in an era of growing geopolitical uncertainty.

The Inductive Sensor Advantage

Instead of responding to magnetic fields, inductive sensor detect the position through changes in inductance—typically, they create an oscillating electromagnetic field and sense variations caused by the proximity or movement of conductive materials.

Let’s examine how inductive sensors address the challenges outlined above—and in many cases, surpass the performance of their magnetostrictive and magnetic-based counterparts.

Technical Benefits of Inductive Sensors

• Superior Noise Resistance: Inductive sensors are inherently less sensitive to stray magnetic fields. Since their detection mechanism is based on eddy currents and changes in inductance rather than external magnetic flux, they are far more resistant to electromagnetic interference (EMI) commonly encountered in industrial environments. This makes them ideal for deployment near motors, transformers, and other sources of magnetic noise.
• Reliability and Longevity: Inductive sensors have no moving parts and do not rely on magnets that can demagnetize over time or lose performance due to temperature fluctuations. Their solid-state construction translates to higher reliability and longer operational lifespans, reducing maintenance needs and downtime.
• High Precision and Repeatability: Modern inductive sensors offer excellent repeatability and linearity, making them suitable for precision position and displacement measurements. Many can achieve micron-level accuracy, rivaling or exceeding the performance of magnetic-based devices in demanding applications.
• Robustness in Harsh Environments: Inductive sensors are less affected by dust, dirt, oil, or non-metallic debris, as their detection mechanism is focused on conductive materials. This makes them particularly useful in industrial settings where contaminants are prevalent.

Inductive rotary encoders such as Zettlex ‘IncOder’ by Novanta, offer the durability of a traditional resolver with modern communication protocols such as BiSS and SSI.

Supply Chain Benefits: Navigating the New Geopolitical Realities

In recent years, supply chain vulnerabilities have come to the forefront of global manufacturing strategies, with particular emphasis on the sourcing of rare earth elements. China dominates the global supply of rare earth magnets, accounting for roughly 60% of production and even higher proportions for certain types such as neodymium-iron-boron magnets. Export restrictions, trade disputes, and shifting geopolitical alliances have together created an environment of uncertainty for manufacturers dependent on these materials.

Inductive sensors, by contrast, do not rely on rare earth magnets. Their core components—typically copper windings and ferrite cores—are widely available and less prone to bottlenecks. This shift has several profound implications:

• Cost Stability: With no need for rare earth elements, inductive sensors are less subject to price volatility driven by mining restrictions, environmental regulations, or trade embargoes.
• Reduced Supply Chain Risk: Manufacturers who adopt inductive sensor technologies are less exposed to disruptions stemming from geopolitical tensions—including export bans, tariffs, or sudden shortages. This reliability translates to more predictable production schedules and lower inventory costs.
• Flexibility in Global Procurement: Since copper and ferrite are available from a broad array of countries and suppliers, companies can more readily diversify their sourcing strategies, further insulating themselves from external shocks.

Application Scenarios: Where Inductive Sensors Shine

The transition from magnetic-based to inductive sensors is not merely theoretical—industries across the spectrum are adopting these technologies for a variety of tasks. Some prominent applications include:

• Position Sensing in Automation: Robotic arms, conveyor systems, and assembly lines benefit from the fast response and noise immunity of inductive sensors, enabling precise feedback for control systems.
• Speed and Proximity Detection: Inductive sensors provide accurate detection of rotating or moving metallic parts, essential for motor control, safety systems, and process monitoring.
• Liquid Level Measurement: Inductive sensors can be deployed to measure the level of conductive fluids in tanks or vessels, offering robust solutions for the chemical and food industries.
• Defense: From vision gimbals to vehicles such as tanks, advanced defense equipment relies on inductive sensors for its combination of performance and durability.

Positek ‘LVIT’ sensors are an alternative for many LVDT and magnetostrictive sensors. Available in a wide variety of housings, including ‘in-cylinder’, they are also available with ATEX, CSA and Intrinsically Safe (IS) ratings for hazardous environments.

Conclusion: The Future is Inductive, Let Everight be Your Partner

The ongoing transformation in sensing technology reflects a broader shift: industries are adapting not only to meet technical demands but also to ensure resilience in the face of geopolitical uncertainty. Inductive sensors, with their robust technical performance and supply chain advantages, are poised to become the preferred choice for position and proximity measurement in industrial automation.

That said, you don’t need to make the change alone. With two decades of experience, Everight Position is here to help every step of the way. From defining specifications for custom sensors to sourcing drop-in replacements to keep OEMs running and making deadlines. Where ever your are in the in the design or manufacturing process Everight can help. We look forward to working with you.