Rare earth magnets are often coated to improve corrosion resistance and long-term durability, but coating thickness is not always easy to verify consistently. Magnets are often small, geometrically challenging, and used in applications where coating quality directly affects product reliability.
Magnets and magnetic assemblies can be difficult to inspect consistently when coatings are thin and part sizes are small.
Local thin spots or uneven coating coverage can affect corrosion protection and long-term component performance.
Contact-based inspection may be less attractive when handling delicate or awkwardly shaped parts in repeatable production workflows.
EV, aerospace, defense, and electronics applications increasingly require better measurement records and process verification.
For manufacturers trying to improve coated magnet quality, reduce inspection uncertainty, or collect more meaningful thickness data, non-contact coating measurement can provide a much better workflow than relying only on manual spot checks.
AIM Systems uses a photothermal coating thickness measurement principle to determine coating thickness without contacting the surface. For rare earth magnet coatings, this makes the system attractive where repeatability, non-contact inspection, and better coating data are important.
The CoatPro platform can be used in applications where coated magnetic components require more consistent thickness verification than basic spot checks can provide. This is especially relevant for coated magnets used in electric motors, robotics, electronics, aerospace, and other high-value applications.
Ethernet communication, Modbus TCP PLC integration, Power-over-Ethernet, and multiple measurement modes help the system fit into engineering labs, automated inspection cells, and more structured production data workflows.
If your team is trying to move from limited manual inspection toward more repeatable magnet coating data or mapped inspection, this is the type of architecture worth evaluating.
For a deeper technical explanation of how this measurement method works, see our guide to photothermal coating thickness measurement technology.
Read our detailed article explaining how non-contact photothermal technology can be used to measure coating thickness on rare earth magnets, including NdFeB components with nickel, epoxy, zinc, and other protective coatings used in EV, robotics, aerospace, and electronics applications.
Read the Magnet Coating Article| Measurement Principle | Photothermal (non-contact) |
| Typical Substrates | Rare earth magnets, coated metal components, technical surfaces |
| Coating Type | Nickel-based coatings, epoxy coatings, corrosion-protection coatings, specialty protective layers |
| Measurement Modes | Single-point, continuous scan, mapped inspection |
| Integration | Ethernet, Modbus TCP, PoE |
Rare earth magnet coating thickness measurement is especially relevant where coated magnets or magnetic assemblies are used in applications that demand corrosion protection, repeatability, and better inspection confidence.
Coated magnets and magnetic assemblies used in electric motors and transportation systems where durability and corrosion protection matter.
NdFeB magnets and coated magnetic components used in robotics, sensors, electronics, and precision assemblies.
Applications where coated magnetic components require better process verification and more reliable thickness documentation.
Engineering teams working on coating repeatability, inspection validation, and improved measurement workflows on coated magnets.
If the goal is better coated magnet process understanding, fewer quality escapes, or more confidence in protective coating repeatability, this category is often worth evaluating.
Convert between coating thickness, coating weight, and density for engineering calculations and specification review.
Estimate the return from improved coating consistency, reduced scrap, better process visibility, and fewer quality escapes.
Review broader coating thickness and coating weight measurement technologies supported across AIM Systems and Scantech applications.
Gauge Advisor is the official sales and service partner for AIM Systems to deliver non-contact coating thickness measurement solutions for demanding production and development environments. AIM’s photothermal systems support coated magnet inspection, automated measurement, thickness mapping, and repeatable measurement workflows for technical coatings and small coated components.
Send your coating type, typical thickness range, substrate, part geometry, and whether you need single-point verification, mapped thickness data, or automated inspection. We will help you determine the most practical measurement approach for your application. Not sure whether your coated magnet or protective layer is a fit? We offer application review and testing support to help assess measurement repeatability.
