The **E3S-R86** is a high-performance, self-contained photoelectric sensor manufactured by Omron. It belongs to the E3S series and is specifically designed for the detection of transparent objects (such as glass or plastic bottles). --- ### 1. Technical Specifications The E3S-R86 is a **Retro-reflective** sensor. It works by emitting light toward a reflector; when an object breaks or attenuates the beam, the sensor triggers. | Feature | Specification | | :--- | :--- | | **Sensing Distance** | 100 mm to 1 m (with specified reflector) | | **Light Source** | Infrared LED | | **Supply Voltage** | 10 to 30 VDC | | **Current Consumption** | 40 mA maximum | | **Output Type** | PNP (Open Collector) | | **Control Output** | Light-ON / Dark-ON (Switchable) | | **Response Time** | 1 ms maximum | | **Connection Method** | M12 Connector (4-pin) | | **Enclosure Rating** | IP67 (Waterproof/Oil-resistant) | --- ### 2. Key Electronic Components & Functions #### A. The Optical System Unlike standard sensors, the E3S-R86 uses **Polarized Light**. * **Emitter/Receiver:** It contains an infrared LED and a phototransistor. * **Polarizing Filters:** These allow the sensor to ignore "glare" from shiny surfaces. It only recognizes light that has been rotated by the corner-cube reflector, making it highly reliable for clear glass detection. #### B. The Output Circuitry The device utilizes a **PNP Open Collector** output. * When the sensor is triggered, it connects the output pin to the positive supply voltage (Vcc). * It includes short-circuit and reverse polarity protection to prevent damage from incorrect wiring. #### C. Sensitivity Adjustment There is a built-in **Trimmer (Potentiometer)**. * This allows the user to fine-tune the threshold. Since transparent objects only block a small percentage of light, the electronics must be sensitive enough to detect minute drops in light intensity. --- ### 3. Wiring Diagram (M12 Connector) The E3S-R86 uses a standard 4-pin M12 connector. The typical pinout is as follows: ```text Pin 1: Brown --> +V (10-30 VDC) Pin 2: White --> L/D Select (Control Input) Pin 3: Blue --> 0V (GND) Pin 4: Black --> Output (PNP) ``` --- ### 4. Application Strengths * **Clear Object Detection:** Optimized for PET bottles, glass vials, and transparent films. * **Metal Housing:** The "E3S" designation often implies a rugged metal body (Zinc die-cast), providing high mechanical durability and EMI shielding. * **High Speed:** A 1ms response time makes it suitable for high-speed bottling or packaging lines.