The **FUD-G3-R/Q** is a high-performance **Differential Pressure Transmitter** typically used in HVAC, cleanroom environments, and industrial automation to monitor gas or air pressure. Below is a breakdown of its core electronic components and technical specifications. --- ### 1. Core Electronic Components The device relies on high-precision circuitry to convert physical pressure into an electrical signal. | Component | Description | | :--- | :--- | | **Piezoresistive Sensor** | The heart of the unit; a silicon-based diaphragm that changes resistance when pressure is applied. | | **Signal Conditioner** | An internal ASIC (Application-Specific Integrated Circuit) that amplifies and linearizes the millivolt signal from the sensor. | | **DIP Switches** | Internal electronic switches used to manually select pressure ranges and output types (0-10V vs 4-20mA). | | **Terminal Block** | Screw-down connectors for power supply input and signal output wiring. | | **Zero/Span Potentiometers** | Precision resistors used for manual calibration and field adjustments. | --- ### 2. Technical Specifications The "R/Q" designation often refers to specific configuration options regarding range and output signal. | Feature | Specification | | :--- | :--- | | **Supply Voltage** | 24V AC/DC (±10%) | | **Output Signal** | Selectable 0-10V DC or 4-20mA (3-wire) | | **Pressure Range** | Multi-range (e.g., 0-100 Pa up to 2500 Pa, model dependent) | | **Accuracy** | Typically ±1.0% to ±1.5% Full Scale | | **Protection Class** | IP54 or IP65 (NEMA 4 equivalent) | | **Media** | Non-combustible, non-aggressive gases/air | --- ### 3. Wiring Configuration To interface with a PLC or Controller, the device generally follows a 3-wire schematic: ```text Terminal 1: [V+] 24V AC/DC Power Supply Terminal 2: [GND] Common Ground Terminal 3: [OUT] 0-10V or 4-20mA Signal ``` ### 4. Key Electronic Features * **Automatic Zero-Point Calibration:** Some versions include an electronic solenoid valve to periodically re-zero the sensor, preventing long-term drift. * **Temperature Compensation:** Internal circuitry offsets errors caused by changes in ambient temperature. * **Response Time Adjustment:** Often features a jumper to toggle between "Fast" and "Slow" electronic damping to filter out pressure turbulence. ---