- Purpose and scope: a handheld tool to identify magnetic poles on refractometer components and to test magnetic properties in one compact instrument. - Polarity detection: quickly determine the North and South poles of magnets and classify them by magnetic polarity for NS oriented applications. - Practical benefits: reduces guesswork, delivers repeatable readings, and supports quick decision making in assembly, QA, and maintenance tasks. - Key features: compact portable design with improved measurement precision and reliable performance. - Storage and durability: includes a protective box for safe storage and easy transport; built for repeated use in lab or workshop settings. - Compatibility and use: suitable for lab technicians, technicians in manufacturing, and field service where magnetic pole checks are needed. - Use scenarios: - Quality control during magnet assembly or calibration of refractometer components. - Polarity verification for magnet arrays used in sensors or optical instruments. - On-site field checks of magnet orientation to ensure proper operation.