The **KAS-DB-R/Q** refers to specific variants of **Capacitive Proximity Sensors** manufactured by **Rechner Sensors**. These sensors are high-end industrial components designed to detect materials (solids or liquids) through non-metallic containers or via direct contact. --- ## 1. Core Electronic Specifications The "R/Q" designation typically points to the physical housing style (Rectangular/Quadratic) and specific output configurations. | Parameter | Specification (Typical) | |:---|:---| | **Operating Voltage** | 10 — 35 V DC | | **Output Type** | PNP or NPN (Model dependent) | | **Output Function** | Antivalent (NO + NC) | | **Switching Frequency** | 10 — 50 Hz | | **Sensing Distance ($S_n$)** | 1 mm to 20 mm (Adjustable) | | **Enclosure Rating** | IP 67 (Dust tight / Water immersion) | --- ## 2. Key Electronic Features ### A. Sensitivity Adjustment (Potentiometer) The electronics include a multi-turn potentiometer. This allows the user to: * **Fine-tune the dielectric threshold:** This is crucial for "tuning out" a plastic tank wall so the sensor only reacts to the liquid inside. * **Compensate for moisture:** Adjusting the sensitivity prevents false triggers caused by humidity or film buildup. ### B. High-Performance ASIC Rechner utilizes specialized **Application-Specific Integrated Circuits (ASICs)** within these sensors to ensure: * **Short-circuit protection:** Prevents the internal electronics from burning out if the output is wired incorrectly. * **Reverse polarity protection:** Protects the sensor if the positive and negative power leads are swapped. * **EMC Resistance:** High immunity to electromagnetic interference from nearby motors or radio equipment. ### C. Antivalent Output (NO + NC) Most "R/Q" models provide two output signals simultaneously: 1. **Normally Open (NO):** Closes the circuit when the target is detected. 2. **Normally Closed (NC):** Opens the circuit when the target is detected. This is electronically beneficial for safety monitoring and logic redundancy. --- ## 3. Wiring Diagram Logic The electronics are typically color-coded according to international industrial standards: | Wire Color | Function | Description | |:---|:---|:---| | **Brown** | +VDC | Positive Power Supply (10-35V) | | **Blue** | 0V / GND | Negative / Ground | | **Black** | Output (NO) | Switching signal - Normally Open | | **White** | Output (NC) | Switching signal - Normally Closed | --- ## 4. Application Context Because these sensors use capacitive electronic fields, they are used for: * **Level Control:** Detecting the presence of grain, powder, or liquids. * **Packaging:** Checking if a box is full or empty without opening it. * **Leak Detection:** Detecting liquid in a drip tray.