The **F2VS-AF-R** is a specific model within the F2VS series of **Visual Flow Indicators** (often associated with brands like Azbil or similar industrial instrumentation manufacturers). This device is primarily used to monitor the flow of liquids in industrial piping systems through a visual window and an electronic output signal. --- ### 1. Technical Specifications The "AF-R" suffix typically denotes specific electronic configurations related to the sensor type and the output logic. | Component | Specification | | :--- | :--- | | **Sensor Type** | Hall Effect Sensor / Magnetic Proximity | | **Output Type** | NPN Open Collector (or Reed Switch depending on specific rev) | | **Logic** | Alarm/Pulse output for flow detection | | **Supply Voltage** | Typically 5V to 24V DC | | **Protection Class** | IP64/IP65 (Dust and Splash resistant) | | **Indicator** | LED Status Light (Red/Green) | --- ### 2. Key Electronic Parts & Functionality The F2VS-AF-R functions by converting mechanical motion into an electronic signal: * **The Impeller/Rotor:** Inside the flow chamber, a small rotor with embedded magnets spins as liquid passes through. * **The Pickup Sensor:** Located behind the window or inside the casing, a **Hall Effect IC** detects the magnetic field of the passing rotor blades. * **Signal Processing Circuit:** * **Pulse Generation:** As the rotor spins, the electronic circuit generates a square wave frequency proportional to the flow rate. * **Flow Confirmation:** If the rotor stops (due to a clog or pump failure), the circuit changes the state of the output wire to trigger an alarm. * **LED Indicator:** * **Green:** Indicates normal flow/Power ON. * **Red:** Indicates a flow abnormality or a "No-Flow" state. --- ### 3. Wiring Configuration Most models in this series follow a standard 3-wire or 4-wire color code for the electronic interface: ```yaml Wiring Guide: - Brown: DC (+) Power Supply (12-24V) - Blue: DC (-) Ground/Common - Black: Control Output (NPN / Open Collector) - White: Auxiliary/Pulse Output (Model dependent) ``` ### 4. Application Use-Cases * **Cooling Systems:** Ensuring coolant is flowing to CNC spindles or power electronics. * **Chemical Dosing:** Verifying that a pump is actually moving fluid through the line. * **Machine Protection:** Interlocking the machine operation with the flow signal to prevent overheating. ---