The **PTPH-45G-R** is a high-performance, precision pressure transducer typically used in industrial and aerospace applications. It is designed to convert physical pressure into a measurable electrical signal with high stability. --- ### Technical Specifications Overview Below are the primary electronic and physical characteristics typical of the PTPH series: | Parameter | Specification (Typical) | | :--- | :--- | | **Sensor Type** | Strain Gauge / Piezoresistive | | **Pressure Range** | 0 to 45 PSI (indicated by "45G") | | **Reference Type** | Gauge Pressure (indicated by "G") | | **Output Signal** | Millivolt (mV/V) or Amplified Voltage | | **Termination** | Radial Lead/Connector (indicated by "R") | | **Operating Temp** | -54°C to +121°C | --- ### Key Electronic Components & Construction #### 1. Sensing Element The core of the PTPH-45G-R is a **Piezoresistive Silicon Chip** or a **Foil Strain Gauge** bonded to a stainless steel diaphragm. - When pressure is applied, the diaphragm deflects. - This deflection changes the resistance of the bridge circuit. #### 2. Wheatstone Bridge Configuration The electronic circuit inside is arranged in a **Wheatstone Bridge**. This configuration is essential for: - **Sensitivity:** Detecting minute changes in resistance. - **Temperature Compensation:** Offsetting errors caused by thermal expansion of the materials. #### 3. Signal Conditioning Depending on the specific sub-model, the unit may include: - **ASIC (Application-Specific Integrated Circuit):** For linearizing the output signal. - **Filtering:** To reduce Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI). #### 4. Electrical Interface (The "R" Suffix) The **"R"** in the part number often denotes a **Radial** exit or a specific **Connector Orientation**. This is critical for space-constrained electronic assemblies where a top-exit cable is not feasible. --- ### Typical Wiring Pinout *Note: Always refer to the specific manufacturer datasheet (e.g., Kulite or Honeywell) as pinouts can vary.* | Pin/Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | + Excitation | Positive Input Voltage | | **Black** | - Excitation | Ground / Negative Input | | **Green** | + Output | Positive Signal Lead | | **White** | - Output | Negative Signal Lead | --- ### Applications * **Aerospace Testing:** Monitoring manifold or fuel pressures. * **Industrial Automation:** High-accuracy feedback loops in hydraulic systems. * **Automotive R&D:** Turbocharger boost pressure and intake measurements.