The part number **M2AMS2-3B-R2/Q** refers to a high-performance **solid-state pressure transmitter/transducer** typically manufactured by specialists in instrumentation, such as **Nagano Keiki**. These devices are designed to convert physical pressure into a standardized electrical signal for industrial monitoring. ### 1. Part Number Breakdown While specific manufacturer prefixes may vary slightly, the nomenclature generally follows this logic: | Segment | Component | Description | | :--- | :--- | :--- | | **M2A** | Series/Model | Solid-state pressure transmitter series (Compact type). | | **MS2** | Sensor Type | Often indicates a metallic diaphragm with a strain gauge. | | **3B** | Pressure Range | Typically refers to a specific range (e.g., 0 to 1.0 MPa or similar). | | **R2** | Output Signal | Standard analog output (usually **4–20 mA DC**, 2-wire). | | **Q** | Special Options | Often indicates "High Quality" or specific inspection certificates. | --- ### 2. Core Electronic Components The device functions through a series of integrated electronic stages: 1. **Pressure Sensing Element:** * Uses a **Polysilicon thin-film** or **piezoresistive** sensor element deposited on a stainless steel diaphragm. * As pressure deforms the diaphragm, the resistance of the bridge circuit changes (the Wheatstone Bridge principle). 2. **Signal Conditioning (ASIC):** * An internal Application Specific Integrated Circuit (ASIC) amplifies the millivolt signal from the sensor. * It performs **Temperature Compensation** to ensure accuracy across a wide range of operating temperatures. 3. **Output Conversion:** * The electronics convert the processed signal into a **4–20 mA current loop**. * This is "R2" logic, meaning it is designed for long-distance transmission with high noise immunity. 4. **Protective Circuitry:** * **Reverse Polarity Protection:** Prevents damage if the power supply leads are swapped. * **EMC Filtering:** Shields the signal from electromagnetic interference in industrial environments. --- ### 3. Technical Specifications Common electrical and mechanical characteristics for this series include: | Feature | Specification | | :--- | :--- | | **Supply Voltage** | 12V to 30V DC | | **Output Type** | 4 to 20 mA DC (Current Loop) | | **Accuracy** | Typically ±0.5% F.S. or better | | **Material** | SUS316L (Stainless Steel) for wetted parts | | **Response Time** | < 2ms (high-speed processing) | --- ### 4. Typical Applications * **Hydraulic Systems:** Monitoring oil pressure in heavy machinery. * **Pneumatics:** Compressed air line monitoring. * **Water Treatment:** Pump pressure control. * **HVAC:** Refrigerant and cooling system pressure.