The part number **47LPQ-D2BG-R** refers to a high-performance **Linear Variable Differential Transformer (LVDT)** or a specialized precision sensor component, typically manufactured by companies like TE Connectivity (Measurement Specialties). These components are designed for high-reliability position sensing in industrial or aerospace environments. --- ### 1. Technical Specifications The following table outlines the key electrical and physical characteristics associated with this series: | Parameter | Specification | | :--- | :--- | | **Type** | LVDT (Linear Variable Differential Transformer) | | **Input Voltage** | 3.0 Vrms (Nominal) | | **Frequency Range** | 400 Hz to 5 kHz | | **Linearity** | ±0.25% of Full Scale (Typical) | | **Operating Temperature** | -55°C to +150°C | | **Housing Material** | Stainless Steel | | **Termination** | Radial or Axial Lead Wires / Connector | --- ### 2. Breakdown of the Part Logic While specific suffix meanings can vary by manufacturer, the code generally breaks down as follows: * **47LPQ**: The series designation, indicating a "Low Profile" or specialized "Quarter-inch" diameter body housing for tight spaces. * **D2**: Often refers to the stroke range (e.g., ±0.2 inches or a specific metric displacement). * **BG**: Indicates the configuration of the coil or the specific mounting style (Bushing/Gland). * **R**: Typically stands for **RoHS Compliant** or a **Radial** exit for the wiring. --- ### 3. Functional Principles The 47LPQ operates on the principle of electromagnetic induction: 1. **Primary Coil:** Excitation is applied to the center primary coil. 2. **Secondary Coils:** Two secondary coils are placed symmetrically. 3. **Core Displacement:** A ferromagnetic core moves inside the hollow tube. As it moves, the magnetic flux linkage changes, creating a differential voltage output. 4. **Output:** The position is determined by the phase and amplitude of the output voltage relative to the primary excitation. --- ### 4. Applications Due to the "LPQ" (Low Profile) nature of this part, it is commonly found in: * **Valve Position Feedback:** Monitoring the exact state of hydraulic or pneumatic valves. * **Aerospace Actuators:** Flight control surface positioning. * **Medical Equipment:** High-precision syringe pumps or scanning beds. * **Turbine Control:** Monitoring thermal expansion or governor positions. ---