The part number **47LPQ-50G-R/Q** typically refers to a high-precision, low-pressure sensor component, often manufactured by companies like **All Sensors Corporation**. These sensors are designed for applications requiring extreme sensitivity and stability. --- ### 1. Technical Specifications Overview The "47" series generally denotes a specific architecture within the manufacturer's catalog (often the DLHR or compact series). | Parameter | Specification | Description | | :--- | :--- | :--- | | **Pressure Range** | 0 to 50 inH2O | Measures up to 50 inches of water column. | | **Output Type** | Digital (I2C / SPI) | Provides high-resolution digital data. | | **Pressure Ref** | G (Gage) | Measured relative to atmospheric pressure. | | **Supply Voltage** | 1.68V to 3.6V | Low power consumption suitable for battery use. | | **Accuracy** | High Precision | Low offset and high linearity over temperature. | --- ### 2. Breakdown of Part Number Nomenclature The alphanumeric string defines the physical and electrical characteristics: * **47L**: Represents the specific series (Low Voltage/Low Power Digital). * **PQ**: Often refers to the package style (typically a SIP - Single In-line Package or DIP - Dual In-line Package with porting). * **50G**: * **50**: The numerical pressure rating (50 inches of H2O). * **G**: Gage pressure (single port measurement vs. atmosphere). * **-R/Q**: * **R**: Usually denotes RoHS compliance. * **Q**: Can indicate specific calibration curves or a high-resolution "Quarter" decimal accuracy variant. --- ### 3. Key Electronic Features * **ADC Integration:** These parts usually contain an internal 16-bit to 24-bit Analog-to-Digital Converter (ADC). * **Co-Processor:** Includes on-board compensation logic to handle thermal drift and non-linearity. * **Supply Current:** Extremely low current draw (often in the micro-amp range during sleep), making it ideal for portable medical or HVAC devices. --- ### 4. Common Applications Due to the sensitivity of the 50 inH2O range, this part is frequently used in: 1. **Medical Ventiliation:** Monitoring patient breathing cycles. 2. **HVAC Systems:** Air filter monitoring and VAV (Variable Air Volume) control. 3. **Industrial Controls:** Leak detection and precise liquid level sensing. --- ### 5. Sample I2C Communication Code (C++) If you are integrating this into a microcontroller (like Arduino or ESP32), you would typically communicate via I2C: ```cpp #include #define SENSOR_ADDR 0x29 // Typical address for these sensors void setup() { Wire.begin(); Serial.begin(9600); } void loop() { Wire.requestFrom(SENSOR_ADDR, 3); // Request 3 bytes (Status + Data) if (Wire.available() >= 3) { byte status = Wire.read(); int highByte = Wire.read(); int lowByte = Wire.read(); // Combine bytes and convert to pressure long rawValue = (highByte << 8) | lowByte; Serial.print("Pressure Raw: "); Serial.println(rawValue); } delay(500); } ```