The **HSP-1E-R** is a specialized electronic component, primarily recognized as a **high-precision, single-element piezoelectric pressure transducer** (often associated with manufacturers like Kulite or similar industrial sensor brands). It is designed to convert mechanical pressure into an electrical signal with high stability. --- ### 1. Key Technical Specifications Below are the typical electronic and physical characteristics of this component: | Feature | Specification (Typical) | | :--- | :--- | | **Sensor Type** | Piezoresistive / Silicon on Silicon | | **Input Voltage** | 10VDC (Excitation) | | **Output Signal** | Millivolt (mV) range (e.g., 100mV FS) | | **Pressure Range** | Varies by sub-model (typically 10 to 500 PSI) | | **Operating Temp** | -55°C to +175°C | | **Bridge Impedance** | ~1000 Ohms (Input/Output) | --- ### 2. Electronic Core Components The device functions through a series of integrated electronic structures: #### A. The Wheatstone Bridge The heart of the HSP-1E-R is a **Full Wheatstone Bridge** circuit. - Four strain gauges are diffused into a silicon diaphragm. - As pressure deforms the diaphragm, the resistance of the gauges changes. - The circuit converts this resistance change into a differential voltage output. #### B. Compensation Network The "R" in the suffix often denotes a specific **Reference** or **Resistor-compensated** model. Internal electronics include: - **Thermal Compensation:** Miniature resistors are laser-trimmed to ensure the sensor remains accurate as temperatures fluctuate. - **Zero Balance:** Ensures that at zero pressure, the electrical output is as close to 0mV as possible. #### C. Electrical Interface The sensor typically uses a 4-wire configuration: 1. **+ Excitation** (Red) 2. **- Excitation** (Black) 3. **+ Output/Signal** (Green) 4. **- Output/Signal** (White) --- ### 3. Structural Design The electronics are housed in a ruggedized casing to protect the sensitive silicon element: * **Diaphragm:** A micro-machined silicon sensor. * **Header:** Provides hermetic sealing for the internal electrical connections. * **Protection:** Often includes a screen or "B-screen" to prevent physical particles from damaging the internal electronic traces. --- ### 4. Typical Applications Due to its high frequency response and small form factor, it is used in: - **Aerospace:** Monitoring engine turbine pressures. - **Wind Tunnel Testing:** Measuring rapid air pressure fluctuations. - **Automotive:** High-performance brake or oil system monitoring.