## Technical Overview of the F2VS-4WF-R The **F2VS-4WF-R** is a specific electronic component typically identified as a **Flow Sensor** (specifically a Karman Vortex Flow Sensor) manufactured by **Azbil (formerly Yamatake)**. It is widely used in semiconductor manufacturing and liquid delivery systems for high-precision measurement of pure water and chemical liquids. --- ### 1. Key Electronic Specifications Below are the primary electronic characteristics of the F2VS-4WF-R: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Power Supply** | 12 to 24 V DC | Standard industrial DC power requirement. | | **Output Type** | NPN Open Collector | Used for pulse output to PLCs or controllers. | | **Current Consumption** | Max 30 mA | Low power draw for integrated systems. | | **Flow Range** | 0.4 to 4.0 L/min | Specific to the "4W" model designation. | | **Connection Type** | Lead Wire | Typically comes with a 3-wire or 4-wire cable. | | **Protection Class** | IP64 | Resistant to dust and light splashing. | --- ### 2. Functional Components The internal electronics of this sensor are designed around the **Karman Vortex** principle. Here is how the electronic parts function together: 1. **Vortex Generator (Bluff Body):** A physical pillar inside the flow path that creates turbulence (vortices). 2. **Piezoelectric Element:** A ceramic sensor located downstream that detects the pressure fluctuations caused by the vortices. It converts mechanical stress into an electrical signal. 3. **Signal Processing Circuit:** An internal PCB that filters noise and converts the analog signals from the piezo element into a digital pulse string. 4. **Amplifier:** Ensures the signal strength is sufficient to be transmitted over long cable runs without loss of integrity. --- ### 3. Wiring Configuration The F2VS series typically follows a standard color-coded wiring scheme: | Wire Color | Function | Description | | :--- | :--- | :--- | | **Brown** | V+ | Positive Power Supply (12-24V DC). | | **Blue** | 0V / GND | Negative Power Supply / Common. | | **Black** | OUT | Pulse Output (NPN). | > **Note:** Because it is an NPN Open Collector output, a pull-up resistor may be required if the receiving PLC/Counter does not have one internally. --- ### 4. Part Number Breakdown The specific model **F2VS-4WF-R** indicates: * **F2VS:** Series name (Karman Vortex Flow Sensor). * **4W:** Flow range (up to 4 L/min). * **F:** Body material (usually New PFA / Fluororesin for chemical resistance). * **R:** Specific connection or revision code (often referring to flared tube fittings). ---