The **M2SES-1BA-R2/Q** is a high-precision, industrial-grade **Magnetostrictive Linear Position Sensor** manufactured by **Santest**. This sensor is designed to provide non-contact, absolute position feedback, commonly used in hydraulic cylinders and industrial machinery. --- ### 1. Technical Specifications Below are the primary electronic and physical characteristics of the sensor: | Feature | Specification | | :--- | :--- | | **Sensor Type** | Magnetostrictive (Non-contact) | | **Output Type** | Analog (Voltage or Current) | | **Supply Voltage** | 24V DC (Standard range 15V - 30V) | | **Resolution** | Continuous / Infinite (restricted by A/D converter) | | **Linearity** | < ±0.05% FS (Full Scale) | | **Operating Temp** | -20°C to +70°C | | **Protection Class** | IP67 / IP68 (Depending on housing) | --- ### 2. Core Electronic Components The device functions through three main electronic stages: 1. **Waveguide Element:** A wire made of ferromagnetic material (typically a nickel-iron alloy) that transmits the ultrasonic strain wave. 2. **Transducer/Pickup Coil:** Located at the head of the sensor. It detects the arrival of the mechanical strain pulse and converts it back into an electrical signal. 3. **Signal Processing Circuitry (The "Head"):** * **Microprocessor:** Measures the time-of-flight between the interrogation pulse and the return pulse. * **Digital-to-Analog Converter (DAC):** Converts the time measurement into a stable analog signal (e.g., 4-20mA or 0-10V). * **Filtering & Protection:** Includes Reverse Polarity Protection and Overvoltage protection to safeguard the electronics in industrial environments. --- ### 3. Operational Logic The sensor operates on the **Wiedemann Effect**: * **The Pulse:** The sensor electronics send a current pulse down the waveguide. * **The Interaction:** This pulse meets the magnetic field of a moving "position magnet." * **The Reaction:** A mechanical strain wave (torsional pulse) is generated at the point of the magnet. * **The Calculation:** The electronics measure the time it takes for this wave to travel back to the sensor head at the speed of sound. Since the speed is constant, the position is calculated with extreme accuracy. --- ### 4. Part Number Breakdown (M2SES-1BA-R2/Q) * **M2S:** Series identifier (Compact/Standard series). * **E:** External type (usually refers to the mounting style or rod type). * **S:** Stainless steel construction for the sensing rod. * **1BA:** Specific stroke range and output calibration code. * **R2:** Connector type (typically a circular M12 or specific industrial plug). * **Q:** Specialized calibration or high-speed response option.