The GLV18-8-200/25/102/115 photoelectric switch represents a critical component in modern industrial automation, offering reliable object detection and positioning capabilities. This device operates on the principle of light beam interruption or reflection to sense the presence, absence, or distance of objects without physical contact. Its compact cylindrical housing, typically measuring 18mm in diameter, is designed for easy integration into machinery, conveyor systems, and safety applications. The "8" in its model number often denotes an 8mm sensing distance, while "200" may refer to its operating voltage range or specific detection characteristics. The "25/102/115" parameters likely indicate thread dimensions, cable lengths, or output configurations tailored for industrial environments.
Photoelectric switches like the GLV18-8-200/25/102/115 are favored for their versatility and durability. They can function in diverse modes: through-beam, retro-reflective, or diffuse reflective sensing. Through-beam models consist of separate emitter and receiver units, providing long-range detection with high accuracy. Retro-reflective types use a reflector to bounce light back to the receiver, simplifying installation. Diffuse reflective variants detect objects by measuring light reflected directly from the target, ideal for close-range applications. The GLV18-8-200/25/102/115 typically incorporates a modulated infrared LED light source to minimize interference from ambient light, ensuring stable performance in factories, warehouses, and outdoor settings.
Key technical specifications of the GLV18-8-200/25/102/115 include a robust housing rated IP67 for dust and water resistance, enabling operation in harsh conditions. Its switching output is often configurable as NPN or PNP transistor-based, compatible with PLCs (Programmable Logic Controllers) and other control systems. The device may feature a response time in milliseconds, allowing high-speed detection on fast-moving production lines. Many models include diagnostic LEDs to indicate power status and output activation, aiding in troubleshooting. Electrical connections are typically made via pre-wired cables or quick-disconnect M12 connectors, with wiring options for 10-30V DC or 90-250V AC power supplies depending on regional standards.
Installation and alignment of the GLV18-8-200/25/102/115 require attention to environmental factors. Mounting brackets or threaded barrels facilitate secure positioning, while adjustable sensitivity potentiometers allow fine-tuning for different object colors, sizes, or surface textures. Users must consider factors like target material opacity, background interference, and temperature ranges (-25°C to 70°C is common) to optimize performance. Regular maintenance involves cleaning lenses to prevent dust accumulation and verifying alignment to avoid false triggers. In applications such as packaging, material handling, or assembly line monitoring, this photoelectric switch enhances efficiency by counting items, detecting jams, or initiating automated sequences.
Advantages over mechanical limit switches include no moving parts, reducing wear and extending service life. The GLV18-8-200/25/102/115 also offers non-contact sensing, eliminating physical damage to both the switch and detected objects. However, limitations may arise in environments with heavy fog, steam, or highly reflective surfaces, where optical sensing can be compromised. Comparing it to ultrasonic or inductive sensors, photoelectric switches excel in long-range detection of non-metallic objects but may struggle with transparent materials unless specialized polarized lenses are used. Industry trends show integration of IO-Link communication for smart factory setups, enabling real-time diagnostics and parameter adjustments via network protocols.
When selecting a photoelectric switch, engineers evaluate the GLV18-8-200/25/102/115 based on application needs: sensing range, output type, and environmental ratings. For example, in automotive manufacturing, it might detect components on robotic arms, while in food processing, stainless steel housings with washdown capabilities are preferred. Compatibility with safety circuits (e.g., OSSD outputs) is crucial for guarding applications. Manufacturers often provide datasheets detailing exact specifications, wiring diagrams, and mounting instructions to ensure proper deployment. As automation evolves, devices like this continue to support Industry 4.0 initiatives by enabling precise, reliable sensing for interconnected systems.
