The **M2SES-2AA-R2/Q** is a high-performance **Magnetic Speed Sensor** primarily designed for industrial and automotive applications. It is engineered to detect the rotation speed of gears or ferrous targets without physical contact. --- ### 1. Technical Specifications Below are the core electronic characteristics typically associated with this model: | Feature | Specification | | :--- | :--- | | **Sensor Type** | Variable Reluctance (VR) / Magnetic Pick-up | | **Output Type** | Analog Sine Wave | | **Connector Type** | 2-Pin (AA Style) | | **Housing Material** | Stainless Steel (Corrosion Resistant) | | **Operating Temp** | -40°C to +105°C (Typical range) | | **Sensitivity** | High (Capable of reading at low RPM) | --- ### 2. Internal Component Breakdown The device functions as a passive generator. The "electronic parts" inside the housing are relatively simple but robust: 1. **Permanent Magnet:** Located at the core. It creates a stationary magnetic field extending from the sensor tip. 2. **Pole Piece:** A ferrous metal rod that focuses the magnetic flux toward the target (the gear teeth). 3. **Inductive Coil:** Thousands of turns of fine copper wire wrapped around the magnet/pole piece. 4. **Epoxy Encapsulation:** A potting compound that protects the internal wiring from vibration, moisture, and thermal shock. --- ### 3. Functional Operation The electronics operate based on **Faraday’s Law of Induction**: * **Flux Change:** As a ferrous gear tooth passes the sensor tip, it changes the shape of the magnetic field. * **Voltage Induction:** This change in flux induces a voltage across the internal copper coil. * **Signal Output:** The output is an AC sine wave where the **frequency** is directly proportional to the rotational speed and the **amplitude** increases as speed increases. --- ### 4. Wiring and Integration Since this is a **2-wire (R2)** configuration, it is generally "self-powered": * **Pin A:** Signal High (+) * **Pin B:** Signal Low/Ground (-) * **Shielding:** Usually requires a twisted shielded pair cable to prevent Electromagnetic Interference (EMI) from corrupting the low-voltage signal. ---