SICK VL18-4N3640 Photoelectric Retro-Reflective Sensor M18

SICK VL18-4N3640 Photoelectric Retro-Reflective Sensor – High-Performance M18 Detection

The SICK VL18-4N3640 is a compact, high-reliability M18 photoelectric retro-reflective sensor designed for accurate object detection across demanding industrial environments. Featuring a visible red LED light source, axial optical alignment, and a long sensing range of up to 3.7 m with reflector C110A , it offers dependable detection even in fast-moving applications. The rugged PBT/PC housing, IP67 enclosure rating, and wide operating temperature range ensure stable performance on conveyors, packaging lines, and material-handling systems. This sensor solves common problems such as inconsistent detection, poor alignment tolerance, and downtime caused by mechanical switches.

The VL18-4N3640 delivers fast response times of ≤ 2 ms, enabling reliable detection of small or rapidly moving objects in automated production lines . Its NPN switching output, light/dark switching capability, and integrated polarizing filter ensure stable operation even in reflective or changing lighting environments. The sensor’s extended lifetime LED (100,000 h typical) and durable mechanical design minimize maintenance needs. The M12 4-pin connector streamlines installation, while its compact cylindrical body fits easily into tight machine layouts. These features combine to reduce false triggers, enhance throughput, and deliver long-term operational stability in real-world factory settings.

Why SICK VL18-4N3640?

The SICK VL18-4N3640 is the sensor you choose when you need dependable detection without compromises. Its long 3.7 m range, rapid 2 ms response time, and rugged M18 housing make it a compact powerhouse for automation. It delivers stable, consistent performance even in changing industrial conditions, reducing re-adjustments and keeping production running smoothly.

What Problem Does It Solve?

This sensor eliminates unreliable object detection caused by vibration, glare, tight spaces, and inconsistent lighting. Its polarized retro-reflective design cuts through reflective surfaces, while fast switching ensures no missed items on high-speed lines. The result: fewer false triggers, fewer stoppages, and a more predictable, efficient workflow in any automated environment.

Key Features & Specifications – SICK VL18-4N3640: 6013596

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The Applications of the SICK VL18-4N3640

1. High-Speed Carton Detection on Packaging Conveyors

Modern packaging lines move cartons so quickly that ordinary sensors struggle to track them reliably. The VL18-4N3640 solves this by reacting in just a few milliseconds, allowing it to identify even narrow gaps between moving boxes. Its polarized detection method prevents shiny wrapping films from confusing the sensor, which is a common issue near sealing stations. Because the sensor can monitor objects from several meters away, it can be installed away from moving parts, reducing mechanical risk. This leads to smoother material flow, fewer misfeeds, and reduced downtime caused by unexpected stoppages or misalignment.

2. Pallet Position Confirmation in Automated Storage Systems

Automated warehouse shuttles rely heavily on accurate pallet placement before lifting, stacking, or transporting. The VL18-4N3640’s focused optical beam allows it to detect pallet edges or gaps with precision, even in dim or dusty aisles. Its rugged enclosure ensures stable performance despite frequent movement of forklifts and constant airborne particles. Maintenance teams benefit from the visible LED beam, which simplifies alignment checks during routine inspections. With its long sensing capability, the sensor confirms pallet presence without requiring close-range mounting, helping robotic systems prevent misalignment, load slippage, and unnecessary handling errors.

3. Bottle Presence Detection in Beverage Filling Lines

In beverage production, lines often handle transparent bottles that can easily confuse ordinary sensors. The VL18-4N3640’s polarized retro-reflective design ensures it can detect clear or glossy containers consistently without reacting to reflections from wet or metallic surfaces. Its durable housing withstands moisture and cleaning sprays commonly present around rinsing and filling equipment. The fast switching performance allows it to keep up with rapid bottle flow, ensuring every bottle is registered before filling or capping. This avoids underfilled containers, prevents spills, and supports the smooth operation of continuous high-speed bottling lines.

4. Part Counting in Electronics Assembly Lines

Electronics factories often move small circuit boards or shallow trays that challenge wide-beam sensors. The VL18-4N3640’s straight optical alignment allows it to detect these low-profile items accurately, even when they are closely spaced. Its compact cylindrical body fits well into tight machinery layouts where space is limited. Because it responds quickly, it synchronizes effectively with fast-moving robotic pick-and-place equipment, reducing counting errors. The sensor’s long-life LED minimizes maintenance interruptions, which is essential in facilities running multiple shifts. This reliable detection ensures accurate flow control and better coordination between conveyor sections.

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