The **F2VS-KA-R/Q** refers to a high-performance **Flow Sensor** (specifically a Karman vortex type) manufactured by **CKD Corporation**. These sensors are designed for monitoring the flow of fluids in industrial automation, often used in semiconductor manufacturing or cooling systems. --- ## 1. Electronic Specifications & Part Breakdown The model code "F2VS-KA-R/Q" breaks down into specific electronic and physical characteristics: | Feature | Specification / Description | | :--- | :--- | | **Detection Method** | Karman Vortex (Uses a bluff body to create pressure fluctuations) | | **Output Type (R)** | **Switch Output:** NPN/PNP open collector (depending on specific wiring) | | **Analog Output (Q)** | **Integrated Output:** Usually provides a 1–5V or 4–20mA signal for continuous monitoring | | **Power Supply** | 12 to 24V DC (±10%) | | **Current Consumption** | Typically 50mA or less | | **Display** | Integrated 2-color LED (Red/Green) for threshold status | --- ## 2. Key Electronic Components The internal electronics of the F2VS series consist of three primary stages: ### A. The Piezoelectric Sensing Element * **Function:** Located downstream of the vortex generator. It detects the frequency of the pressure oscillations (vortices). * **Signal:** Converts mechanical pressure into a low-voltage AC electrical signal. ### B. Signal Processing Circuit (ASIC) * **Filtering:** Filters out mechanical noise and vibrations to ensure the vortex frequency is isolated. * **Conversion:** Converts frequency directly into a flow rate value (L/min). ### C. Output Interface * **Pulse Output:** Used for totalizing (counting) flow. * **Analog Output:** A linear voltage or current representing the instantaneous flow rate. * **Protection:** Includes short-circuit protection and reverse polarity protection to prevent damage during installation. --- ## 3. Wiring Diagram (Typical Configuration) The unit typically uses a M8 or M12 connector or a direct lead wire. ```markdown Wire Color | Function | Description -----------|------------------|--------------------------- Brown | DC (+) | +12 to 24V DC Blue | DC (-) | 0V / GND Black | OUT 1 | Control Output (Switch) White | OUT 2 / Analog | Analog Output (1-5V) ``` --- ## 4. Application Considerations * **Response Time:** The electronic response time is generally around 1 second or less, adjustable via the integrated menu. * **Accuracy:** ±2.5% F.S. (Full Scale) or better, maintained by the internal digital temperature compensation. * **Environment:** The electronics are housed in a PBT or PPS resin casing, typically rated at **IP65** for moisture and dust resistance.