The **PTPH-1GA-R** is a high-precision, industrial-grade **Pressure Sensor (Transducer)** designed primarily for automotive and HVAC applications. It is manufactured by companies like Sensata Technologies (Kavlico brand). --- ## 1. Technical Specifications The following table highlights the core electronic and mechanical parameters of the PTPH-1GA-R: | Parameter | Specification | | :--- | :--- | | **Sensor Type** | Piezoresistive / Thin Film | | **Pressure Range** | 0 to 10 Bar (typical for this series) | | **Supply Voltage (Vcc)** | 5.0 ± 0.25 VDC | | **Output Type** | Ratiometric Analog (0.5V to 4.5V) | | **Current Consumption** | < 10 mA | | **Operating Temperature** | -40°C to +125°C | | **Accuracy** | ±1.0% to 1.5% FS (Full Scale) | | **Electrical Connection** | Packard Metri-Pack 150 Series | --- ## 2. Key Electronic Components Internally, the PTPH-1GA-R consists of several critical electronic stages to ensure signal integrity: ### A. Sensing Element It typically uses a **Piezoresistive strain gauge** or a **Thin-film ceramic** diaphragm. When pressure is applied, the physical deformation changes the electrical resistance of the bridge circuit. ### B. Signal Conditioning (ASIC) The sensor contains an Application-Specific Integrated Circuit (ASIC) that performs the following: * **Amplification:** Boosts the millivolt signal from the sensing element to a usable 0-5V range. * **Temperature Compensation:** Corrects for drift caused by heat, ensuring accuracy across the entire operating range. * **Calibration:** Fine-tunes the zero-point (offset) and the span (slope). ### C. Protection Circuitry To survive harsh industrial environments, the internal PCB includes: * **Reverse Polarity Protection:** Prevents damage if the power leads are swapped. * **EMI/RFI Filtering:** Reduces interference from nearby electronic noise or radio frequencies. * **Overvoltage Protection:** Guards against voltage spikes from the power supply. --- ## 3. Pinout Configuration The device usually utilizes a 3-pin connector layout: ```text Pin 1: Ground (GND) Pin 2: Output Signal (Vout) Pin 3: Supply Voltage (Vcc / +5V) ``` --- ## 4. Typical Applications * **Automotive:** Monitoring oil pressure, fuel pressure, or transmission fluid. * **HVAC/R:** Refrigerant pressure monitoring in industrial cooling systems. * **Hydraulics:** Real-time feedback for hydraulic pumps and actuators.