The **KFS-KD-R** refers to a high-precision, electromagnetic induction type displacement sensor or flow control component, typically manufactured by companies like **Kofloc**. These devices are used for precision measurement of gas or liquid flow and mechanical positioning. Below is a breakdown of the electronic parts and functional components associated with this series. ### 1. Core Electronic Components | Component | Description | Function | | :--- | :--- | :--- | | **Inductive Transducer** | A coil assembly and a movable core. | Detects the physical position of the float or needle using electromagnetic fields. | | **Signal Conditioner** | Integrated PCB with operational amplifiers. | Converts raw inductive changes into a linear DC voltage or current (4-20mA). | | **Zero/Span Trim** | Potentiometers (often located under a cap). | Allows for field calibration to ensure the output matches the actual flow/position. | | **A/D Converter** | Analog-to-Digital circuitry (in digital models). | Translates analog signals for communication via RS-232 or RS-485. | --- ### 2. Functional Electronic Features The electronic architecture of the KFS-KD-R is designed for stability in industrial environments. Key features include: * **Non-Contact Sensing:** Because it uses electromagnetic induction, there is no physical contact between the sensor electronics and the fluid/moving parts, leading to a longer lifespan. * **Linearity Correction:** The internal circuitry compensates for the non-linear nature of fluid dynamics, providing a 1:1 ratio between the physical position and the electrical output. * **EMI/RFI Shielding:** The metal housing acts as a Faraday cage to protect the sensitive internal amplifiers from industrial electrical noise. --- ### 3. Wiring and Interface Specifications Most KFS-KD-R modules utilize a standard industrial connector. The pinout typically follows this logic: ```yaml Pin 1: Power Supply (+) [Usually 15-24V DC] Pin 2: Power Supply (-) [Common Ground] Pin 3: Signal Output (+) [0-5V or 4-20mA] Pin 4: Case Ground [Shielding] ``` --- ### 4. Technical Specifications Table | Parameter | Typical Value | | :--- | :--- | | **Input Voltage** | DC 12V to 24V | | **Current Consumption** | < 50mA | | **Output Impedance** | Low (typically < 100 Ohms for voltage) | | **Response Time** | < 100ms | | **Accuracy** | ±1% to ±2% of Full Scale |