The **ALPT-123-R** is a high-performance, ultra-compact pressure transducer designed for industrial and aerospace applications where space is limited and reliability is critical. ### Technical Specifications Overview The ALPT series is known for its rugged construction and precision. Below are the key electronic and physical specifications: | Parameter | Specification | | :--- | :--- | | **Pressure Range** | Typically 0 to 100-5000 PSI (Model dependent) | | **Output Signal** | 0.5 to 4.5 VDC (Ratiometric) | | **Supply Voltage** | 5.0 ± 0.25 VDC | | **Accuracy** | ±0.25% to ±0.5% FSO | | **Operating Temp** | -40°C to +125°C | | **Material** | 17-4 PH Stainless Steel | --- ### Key Electronic Components & Features #### 1. Piezoresistive Sensing Element The core of the ALPT-123-R is a **micromachined silicon strain gauge**. When pressure is applied to the stainless steel diaphragm, the silicon element deforms, changing its electrical resistance. This change is proportional to the pressure. #### 2. Signal Conditioning Circuitry Inside the compact housing, the device contains a miniaturized **ASIC (Application Specific Integrated Circuit)**. Its functions include: * **Amplification:** Boosting the millivolt signal from the sensor to a usable 0.5-4.5V range. * **Temperature Compensation:** Correcting for thermal drift to ensure accuracy across the entire operating temperature range. * **Linearization:** Ensuring the output voltage is a straight-line representation of the input pressure. #### 3. Electrical Interfacing The "R" suffix often denotes a specific connector type or ratiometric output configuration. * **Wiring:** Usually involves a 3-wire system (Excitation, Ground, and Signal). * **Ratiometric Output:** The output voltage scales with the supply voltage. If the 5V supply fluctuates slightly, the output scales proportionally, which is ideal for integration with microcontrollers and ADCs (Analog-to-Digital Converters). #### 4. Protection Circuitry To ensure longevity in harsh environments, the internal electronics are protected against: * **Reverse Polarity:** Prevents damage if the power leads are connected backwards. * **Overvoltage:** Guards against spikes in the power supply. * **EMI/RFI Filtering:** Reduces noise interference from nearby motors or radio equipment. --- ### Common Applications * **Aerospace:** Hydraulic monitoring in tight airframe compartments. * **Automotive:** Brake and transmission fluid pressure testing. * **Industrial:** Robotic arm pressure sensing and compact manifold blocks. ---