The **F2VS-5B-R** is a specific model within the **F2VS series** of visual flow indicators, commonly manufactured by companies like **Flow-Mon**. These devices are used to monitor the flow of liquids in industrial piping systems. While the primary function is mechanical (a swinging vane or "flap"), the "5B-R" designation typically refers to the integrated **electronic signaling components**. --- ## 1. Core Electronic Specifications The electronic functionality of the F2VS-5B-R is centered around a **limit switch** or **flow switch** assembly that triggers when the flow reaches a specific threshold. | Component | Specification Details | | :--- | :--- | | **Switch Type** | SPDT (Single Pole Double Throw) Microswitch | | **Contact Rating** | Typically 5A @ 125/250 VAC or 30VDC | | **Output Type** | Potential-free (Dry Contact) | | **Connection** | Terminal block inside a weatherproof junction box | | **Enclosure Rating** | Usually IP65 or IP66 (Dust-tight and protected against water jets) | --- ## 2. Operating Mechanism The "Electronic" part of this unit acts as a bridge between physical flow and a Control System (PLC/SCADA). 1. **Magnet/Cam Linkage:** As fluid moves through the body, it pushes a stainless steel flap. This flap is magnetically or mechanically linked to a cam shaft that extends into the electronic housing. 2. **Actuation:** When the flap reaches a pre-set angle (representing a specific flow rate), the cam trips the **Microswitch**. 3. **Signal Transmission:** The switch closes (or opens) a circuit, sending a digital signal to an external alarm, pump controller, or PLC to indicate "Flow" or "No Flow." --- ## 3. Wiring Configuration (SPDT) The F2VS-5B-R uses a standard 3-wire logic for its electronic output: * **COM (Common):** The main input line. * **NO (Normally Open):** Closes when the flow pushes the flap past the set point. * **NC (Normally Closed):** Opens when the flow pushes the flap past the set point. ### Example Wiring Diagram Concept ```text [ Controller ] <--- (Signal) --- [ NO ] [ Power Source] <--------------- [ COM ] [ NC ] (Unused or Alarm) ``` --- ## 4. Key Features of the "R" Variant In the Flow-Mon nomenclature, the **"R"** often signifies specific orientations or materials: * **Bi-directional / Reversible:** The electronic assembly may be rotatable to allow for different pipe flow directions (Left-to-Right or Right-to-Left) without changing the wiring. * **Resetting:** The switch automatically resets via spring tension when the flow drops below the trigger point. ---