Rare Earth Magnets Size: 5mm Diameter x 2mm Height

Signal Excitation: 5mm x 2mm Rare Earth Magnets

In custom harness integration and sensor builds, the trigger source is just as critical as the sensor itself. These high-strength Rare Earth Magnets, measuring 5mm Diameter x 2mm Height, are the definitive solution for creating custom magnetic trigger points. Designed for use with Hall-effect sensors in applications where no ferrous teeth are available, these magnets provide the concentrated flux field necessary for a clean Analogue-to-Digital interface (the digital speed pulse). Whether you are creating a custom wheel speed setup for a drift car or a bespoke driveshaft RPM reference for a 2JZ build, these magnets ensure reliable signal acquisition at extreme rotational speeds.

Engineering Principles: Neodymium Magnetic Density

Rare earth magnets, typically Neodymium (NdFeB), provide a significantly higher magnetic field density compared to traditional ceramic magnets. This allows the sensor to detect the trigger point from a greater air gap, providing a massive safety margin in high-vibration engine bay or drivetrain environments. In a standalone ECU integration, a single magnet can serve as a 1-pulse-per-revolution (PPR) signal for speed or RPM. This is a favorite method for builders performing LS-swaps who need a speed reference from a non-magnetic driveshaft. The 5mm x 2mm dimensions are a calculated size, providing enough mass to generate a strong signal while being small enough to be epoxy-mounted into a pre-drilled pocket in a pulley or collar.

Operational Benefits: Versatility and Timing Accuracy

For the professional fabricator, these magnets offer unparalleled flexibility. In fuel map calibration and data logging, having an accurate speed or position reference is vital. These magnets can be used to create custom sensors for turbocharger speed, suspension travel (using magnetic Hall probes), or even shift position indicators. Because the magnetic field is sharp and consistent, the resulting digital square wave has minimal jitter, which is foundational for maintaining Ignition Timing stability in custom trigger applications. This level of DIY sensor engineering is a hallmark of high-end competition vehicles where standard sensors cannot be packaged.

Installation and Fitment Best Practices

These 5mm DIA x 2mm H magnets are universal and not vehicle-specific. To achieve the best results, they should be mounted into a non-magnetic housing (aluminum, plastic, or stainless steel) using a high-temperature structural epoxy. When using these to trigger a Haltech Hall sensor, the polarity must be matched to the sensor’s requirements (some sensors require the North pole, others the South). During installation, ensure the magnet face is flush with the surface to prevent “catch” events. These are a critical companion for any build utilizing Hall Effect sensors where a custom trigger wheel or split collar cannot be used.

Technical Specifications

Summary & Includes

Rare Earth Magnets are the fundamental trigger source for custom magnetic sensors. Includes: 1 x Set of Rare Earth Magnets (5mm DIA x 2mm H). Note: These are high-strength magnets; handle with care and avoid placing near sensitive electronic storage media.