Sick GL6-N4211 Photoelectric Sensor
The Sick GL6-N4211 photoelectric sensor provides retro-reflective detection, 5 m sensing range, NPN output, and IP67 housing for automation. This Sick 12mm Retro-reflective Photoelectric Sensor uses visible red 650 nm PinPoint LED, operates on 10–30 V DC supply, supports 1,000 Hz switching frequency, and features a rectangular housing with M8 connector. It is part of Sick sensing solutions, listed under Sick Photoelectric Sensors, and belongs to the G6 Series used in industrial automation systems.
| Brand | Sick |
| Product Type | Photoelectric Sensors |
| Model Number | GL6-N4211 |
Sick GL6-N4211 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Functional principle | Photoelectric retro-reflective sensor |
| Functional principle detail | Dual lens |
| Sensing range max. | ≤ 6 m |
| Sensing range | ≤ 5 m |
| Light source | PinPoint LED |
| Type of light | Visible red light |
| Light spot size (distance) | Ø 8 mm (350 mm) |
| Wave length | 650 nm |
| Adjustment | Potentiometer, 270° |
| Supply voltage UB | 10 V DC ... 30 V DC |
| Ripple | ± 10 % |
| Current consumption | 30 mA 3) |
| Protection class | III |
| Digital Output type | NPN |
| Switching mode | Light/dark switching |
| Switching mode selector | Selectable via light/dark selector |
| Signal voltage PNP HIGH/LOW | Approx. VS / ≤ 3 V |
| Output current Imax. | ≤ 100 mA 4) |
| Response time | < 625 µs 5) |
| Switching frequency | 1,000 Hz 6) |
| Housing | Rectangular |
| Dimensions (W x H x D) | 12 mm x 31.5 mm x 21 mm |
| Connection | Male connector M8, 4-pin |
| Housing material | Plastic, ABS/PC |
| Front screen material | Plastic, PMMA |
| Enclosure rating | IP67 |
| Ambient operating temperature | –25 °C ... +55 °C |
| Ambient temperature, storage | –40 °C ... +70 °C |
| Weight | 20 g |
The GL6-N4211 Sick 12mm Retro-reflective Photoelectric Sensor is a retro-reflective sensor designed for precise object detection in industrial automation systems. The GL6-N4211 operates with a dual lens optical principle, providing a ≤ 5 m sensing range and maximum detection distance of ≤ 6 m. It uses visible red 650 nm LED technology and delivers a stable NPN digital output while operating on 10–30 V DC supply. This model is part of the G6 series for structured industrial sensing applications.
The GL6-N4211 Sick 12mm Retro-reflective Photoelectric Sensor is commonly used in conveyors, packaging lines, automated assembly stations, and material handling systems. Its retro-reflective operating principle ensures reliable detection with reflectors across defined distances. The rectangular 12 mm housing supports compact machine integration, while the fast response time enables consistent performance in high-speed automation environments.
The Sick GL6-N4211 Photoelectric Sensor offers dependable operation through its IP67-rated enclosure, standardized M8 connector, and defined electrical characteristics. Stable signal output and controlled sensing distances support predictable integration with PLC and control systems. As part of Sick’s industrial sensing portfolio, the GL6-N4211 is suitable for automation applications requiring consistent detection accuracy, electrical stability, and environmental resistance.

