The **KFS-C4-R/Q** is a specific series of high-precision electronic sensors, typically categorized as **Capacitive Proximity Sensors** or part of a modular sensor system used in industrial automation. These components are designed to detect the presence of objects or liquid levels without physical contact. --- ### 1. Technical Specifications The following table outlines the typical electronic characteristics found in the KFS-C4 series: | Parameter | Specification | | :--- | :--- | | **Sensing Principle** | Capacitive (Change in dielectric constant) | | **Operating Voltage** | 10 – 30 V DC (Typical) | | **Output Type** | PNP or NPN (Normally Open / Normally Closed) | | **Housing Material** | Stainless Steel or High-grade Plastic (PBT/PTFE) | | **Mounting** | Non-flush (usually) | | **Switching Frequency** | 10 Hz – 100 Hz | | **Protection Class** | IP67 (Dust and water-resistant) | --- ### 2. Key Electronic Components The internal architecture of the KFS-C4-R/Q consists of several critical stages: #### A. The RC Oscillator The "heart" of the sensor. It utilizes a sensing electrode and the environment as a capacitor. When an object approaches, the capacitance changes, altering the amplitude of the oscillations. #### B. Evaluation Circuit (Trigger Stage) This part of the circuit monitors the oscillation amplitude. Once the signal crosses a predefined threshold (Schmitt Trigger), it converts the analog oscillation into a digital "High" or "Low" state. #### C. Output Stage (Transistor) The suffix **-R/Q** often denotes the wiring and output logic: * **R:** Often signifies a specific connector type (like an M12 or M8 plug-in) or a relay-like switching behavior. * **Q:** Generally represents the complementary output (Antivalent), meaning the sensor provides both a Normally Open (NO) and a Normally Closed (NC) signal simultaneously. --- ### 3. Connection Diagram (Standard DC) Below is the standard wiring logic for industrial 4-wire DC sensors: ```python # Standard Wire Color Coding # --------------------------- # Brown (BN): +VCC (10-30V DC) # Blue (BU): 0V (GND) # Black (BK): Output (NO - Normally Open) # White (WH): Output (NC - Normally Closed) ``` ### 4. Application Use Cases * **Level Control:** Detecting the level of liquids or granulates through non-metallic container walls. * **Object Detection:** Identifying plastic, glass, wood, or metal parts on a conveyor belt. * **Quality Control:** Checking for the presence of content inside a sealed cardboard box. ---