Photoelectric retro-reflective sensor GL6L-N3211 SICK 12 m NPN Output
Overview:
The GL6L-N3211 is a laser retro-reflective photoelectric sensor from SICK’s G6 series. It features a visible red Class 1 laser light source, a maximum sensing range of 12 m, NPN output, and an M8 3-pin connector.
With a switching frequency of 1,000 Hz and a compact IP67-rated housing, the GL6L-N3211 is an ideal solution for precise object detection in high-speed conveyor systems, packaging, logistics, and industrial automation.
Product Overview – Photoelectric retro-reflective sensor GL6L-N3211
The GL6L-N3211 (Part No. 1117822) is a photoelectric retro-reflective sensor utilizing a visible red laser at 680 nm (Laser Class 1). The extremely small light spot diameter of Ø 3.5 mm at 1 m enables highly accurate detection of small objects and thin materials.
Equipped with a polarization filter, the sensor effectively suppresses false signals from highly reflective surfaces such as metal or transparent plastics. It supports selectable Light ON / Dark ON operating modes. The NPN transistor output delivers a switching frequency of up to 1,000 Hz, making it suitable for high-speed production lines. The M8 3-pin male connector version simplifies installation and reduces cabling costs.
The sensor features IP67 protection, a robust ABS/PMMA plastic housing, and reliable operation across a temperature range of -20 °C to +50 °C. It holds comprehensive certifications (EU, UK, cULus, ACMA, China RoHS, Moroccan, and Laser Safety IEC 60825-1). Its average service life reaches 100,000 hours, ensuring long-term performance in demanding industrial environments.
Key Features:
- Sensing range: 0.08 m – 12 m (with P250F reflector)
- Recommended sensing range: 0.08 m – 10 m
- Light source: Visible red laser, 680 nm, Class 1, light spot Ø 3.5 mm
- Protection rating: IP67
- Operating temperature: -20 °C … +50 °C
- Connection: M8 3-pin male connector | NPN output
Technical Specifications – GL6L-N3211
| Parameter |
Value |
| Model |
GL6L-N3211 |
| Part Number |
1117822 |
| Operating Principle |
Photoelectric retro-reflective sensor (Laser) |
| Dimensions (W x H x D) |
12 x 31.5 x 21 mm |
| Sensing Range Max. |
0.08 m … 12 m (P250F reflector) |
| Recommended Sensing Range |
0.08 m … 10 m (P250F) |
| Light Source |
Visible red laser, 680 nm, Laser Class 1 |
| Light Spot Size |
Ø 3.5 mm (at 1,000 mm) |
| Supply Voltage |
10 – 30 VDC |
| Current Consumption |
≤ 20 mA (no load, at UB = 24 V) |
| Output Type |
NPN |
| Switching Mode |
Light ON / Dark ON, selectable |
| Output Current |
≤ 100 mA (≤ 50 mA when UB > 24 V) |
| Response Time |
≤ 625 µs |
| Switching Frequency |
1,000 Hz |
| Ripple |
< 5 Vpp |
| MTTFD |
1,005 years |
| Electrical Connection |
M8 male connector, 3-pin |
| Housing Material |
Plastic (ABS), front screen PMMA |
| Weight |
Approx. 60 g |
| Polarization Filter |
Yes |
| Enclosure Rating |
IP67 (EN 60529) |
| Ambient Operating Temperature |
-20 °C … +50 °C |
| Storage Temperature |
-40 °C … +70 °C |
| EMC |
EN 60947-5-2 |
| Certifications |
EU, UK, cULus, ACMA, China RoHS, Moroccan, Laser Safety IEC 60825-1 |
Source: Official SICK Datasheet for GL6L-N3211 (Part No. 1117822). Download datasheet link
Industrial Applications – GL6L-N3211
- Packaging & Food Industry: Reliable detection of products on high-speed conveyors thanks to 1,000 Hz switching frequency and tiny laser spot.
- Logistics & Warehousing: Gate control, pallet and forklift detection up to 12 m, stable even under strong ambient light (up to 13,000 lx).
- Automotive Manufacturing: Precise presence checking of small components on assembly lines with 3.5 mm resolution and polarization filter to prevent false triggers on shiny metal surfaces.
- Pharmaceutical & Electronics: Detection of small objects in cleanrooms; IP67 rating withstands washdown.
- Printing & Paper: Edge detection and thin material monitoring in high-speed printing machines.
AUMI has supplied numerous G6 series sensors to manufacturing plants and logistics facilities across Vietnam, providing full technical support from model selection to system integration.
Comparison: GL6L-N3211 vs GL6L-N4211 (G6 Series)
| Criteria |
GL6L-N3211 |
GL6L-N4211 |
| Part Number |
1117822 |
1109724 |
| Connection Type |
M8, 3-pin |
M8, 4-pin |
| Output Type |
NPN |
NPN |
| Max. Sensing Range |
12 m |
12 m |
| Light Source |
Red Laser Class 1 |
Red Laser Class 1 |
| Switching Frequency |
1,000 Hz |
1,000 Hz |
| Protection Rating |
IP67 |
IP67 |
| Wiring |
3-wire standard |
4-wire (with spare pin) |
| Recommended For |
Simple systems |
PLC / expanded systems |
| Advantage |
Cost-effective cabling |
Greater wiring flexibility |
Conclusion:
- Choose the GL6L-N3211 if your system requires simple 3-wire connection (power + GND + signal) for best cost efficiency.
- Select the GL6L-N4211 when you need 4-pin wiring or additional flexibility for PLC integration.
Frequently Asked Questions (FAQ)
Q1: What sensing technology does the GL6L-N3211 use?
It is a laser retro-reflective photoelectric sensor using a 680 nm red laser and polarization filter for accurate object detection.
Q2: What is the maximum sensing range of the GL6L-N3211?
Up to 12 m with the P250F reflector, ideal for conveyor and logistics applications.
Q3: What type of output does the GL6L-N3211 have?
NPN transistor output with selectable Light ON / Dark ON modes and a maximum load current of 100 mA.
Q4: Is the GL6L-N3211 suitable for industrial environments?
Yes. With IP67 protection, it is dust-tight and water-resistant, ensuring reliable operation in factory automation, packaging, and warehousing.
Q5: Should I choose GL6L-N3211 or GL6L-N4211?
The GL6L-N3211 is optimal for standard 3-pin M8 systems. Choose the GL6L-N4211 for 4-pin wiring or expanded PLC integration.
Contact Information for Purchasing GL6L-N3211
AUMI – Official SICK Distributor in Vietnam. Full manufacturer warranty, complete CO/CQ documentation, and 24/7 technical support.
📞 Hotline: 0917 991 589 (Hanoi) | 0932 226 100 (Ho Chi Minh City)
📧 Email: [email protected]
🌐 Website: https://aumi.com.vn/
Addresses:
- Hanoi: B44, Villa Area, Viet Hung Urban Area, Viet Hung Ward
- Ho Chi Minh City: 2nd Floor, HS Building, 260/11 Nguyen Thai Binh, Bay Hien Ward
- Da Nang: 9th Floor, PV Bank Building, No. 2 30-4 Street, Hoa Cuong Ward
