SICK GTB2S-N5311 Photoelectric Proximity Sensor 18mm NPN – G2 Miniature Series
- The GTB2S-N5311 is a miniature photoelectric proximity sensor from SICK, utilizing Background Suppression (BGS) technology for precise object detection in confined installation spaces.
- The sensor features a sensing rangze of 1–18 mm, NPN output, Light ON switching mode, and a fast response time of less than 0.6 ms.
- Its IP67 protection rating ensures reliable operation in harsh industrial environments with dust and moisture exposure.
- The red PinPoint LED light source enables accurate detection of small objects, including low-reflective or dark-colored surfaces.
- The GTB2S-N5311 is widely used in electronics and semiconductor manufacturing, industrial robotics, conveyor and logistics systems, food packaging, and medical equipment applications.
- With an 800 Hz switching frequency, the sensor performs reliably on high-speed production lines without missing objects.
- Compared with the GTB2S-N5331, the GTB2S-N5311 is better suited for short-range sensing applications and cost-optimized installations.
The GTB2S-N5311 is an NPN photoelectric proximity sensor from SICK’s ultra-compact G2 series, featuring a maximum detection range of 18 mm and IP67 protection. Ideal for automation systems requiring sensors in confined spaces.
Overview of GTB2S-N5311 Photoelectric Proximity Sensor
The GTB2S-N5311 belongs to SICK’s G2 series, specifically engineered for detecting small objects in space-restricted installations. The 7.7 × 21.8 × 13.5 mm (W × H × D) housing with M8 connector allows straightforward integration into virtually any industrial machine or equipment.
The BGS operating principle enables precise object detection regardless of background reflectivity—even for jet-black or poorly reflective objects—without interference from the background surface behind the target.
5 key specifications:
- Detection range: 1–18 mm (90% white reflectance target)
- Output: NPN, Light Switching mode
- Protection rating: IP67 – dust-tight and water-immersion resistant
- Supply voltage: 10–30 VDC (12 VDC / 24 VDC nominal)
- Connection: 0.2 m cable with 3-pin M8 connector
GTB2S-N5311 SICK Technical Specifications
| Parameter |
Value |
| Model |
GTB2S-N5311 |
| Part No. |
1064349 |
| Product Series |
G2 – Miniature Photoelectric Sensor |
| Operating Principle |
Photoelectric proximity sensor, Background Suppression (BGS) |
| Housing Dimensions (W × H × D) |
7.7 mm × 21.8 mm × 13.5 mm |
| Max. Sensing Range |
1 mm – 18 mm (90% reflectance target) |
| Sensing Range (6% reflectance) |
4 mm – 15 mm |
| Background Suppression from |
≥ 20 mm |
| Light Source |
PinPoint LED, red, 640 nm wavelength |
| Output Type |
NPN |
| Switching Mode |
Light Switching |
| Max. Output Current |
50 mA |
| Supply Voltage |
10–30 VDC (12 V / 24 V nominal) |
| Switching Frequency |
800 Hz |
| Response Time |
< 0.6 ms |
| Protection Rating |
IP67 |
| Housing Material |
ABS (plastic) |
| Operating Temperature |
-25°C to +50°C |
| Connection |
0.2 m cable, 3-pin M8 connector |
| Approvals |
EU DoC, UK DoC, ACMA DoC, Morocco DoC, China RoHS, cULus, DIN EN 62471 |
Technical data from SICK AG official datasheet.
GTB2S-N5311 Applications in Industry
Thanks to its ultra-compact form factor and BGS principle that ensures accurate detection regardless of background, the GTB2S-N5311 is widely used across industries:
- Electronics & Semiconductor Manufacturing: Detecting miniature components on SMT lines. The 1–18 mm range with PinPoint LED enables precise positioning of chips, PCBs, and tiny parts without interference from conveyor backgrounds.
- Food & Pharmaceutical Packaging: IP67 ensures reliable operation in dusty and humid industrial environments. For washdown applications requiring high-pressure water cleaning, select sensors rated IP66 or IP69K.
- CNC Machines & Industrial Robots: The compact 7.7 × 21.8 mm body integrates directly into robot grippers or CNC tooling fixtures for close-range workpiece and part detection.
- Conveyor & Logistics Systems: Product counting and position confirmation on high-speed conveyors. The 800 Hz switching frequency ensures no object is missed even at high line speeds.
- Medical Equipment & Cleanrooms: Non-magnetic ABS housing is suitable for cleanroom environments; detects test tubes, sample trays in automated laboratory analyzers.
GTB2S-N5311 vs. GTB2S-N5331 Comparison
Both models belong to the same G2 series. The primary difference is the detection range:
| Criterion |
GTB2S-N5311 |
GTB2S-N5331 |
| Max. Detection Range (90%) |
1–18 mm |
1–36 mm |
| Sensing Range (6% black) |
4–15 mm |
5–30 mm |
| Output Type |
NPN |
NPN |
| Connection |
M8 3-pin (0.2 m) |
M8 3-pin (0.2 m) |
| Housing Dimensions |
7.7 × 21.8 × 13.5 mm |
7.7 × 21.8 × 13.5 mm |
| IP Rating |
IP67 |
IP67 |
| Best suited for |
Close-range detection in tight spaces |
Longer detection distance needed |
Note: Choose GTB2S-N5311 if your application requires detection up to 18 mm to optimize cost. Choose GTB2S-N5331 for sensing distances up to 36 mm.
Frequently Asked Questions – GTB2S-N5311 SICK (FAQ)
Q1: What is the price of the SICK GTB2S-N5311 photoelectric sensor?
A: Pricing for the GTB2S-N5311 depends on quantity and order timing. Contact AUMI at +84 917 991 589 (Hanoi) or +84 932 226 100 (Ho Chi Minh City) for the best quote and free technical consultation.
Q2: Where to buy genuine SICK GTB2S-N5311 in Vietnam?
A: AUMI is the authorized SICK distributor in Vietnam, guaranteeing 100% genuine products with full SICK labeling and CO/CQ documentation. Contact our hotline or visit aumi.com.vn to order.
Q3: What industries use the GTB2S-N5311?
A: The GTB2S-N5311 is commonly used in electronics and semiconductor manufacturing, food and pharmaceutical packaging, industrial robotics, logistics conveyor systems, and medical equipment—any application requiring small object detection in confined spaces.
Q4: Is the GTB2S-N5311 waterproof?
A: Yes. The GTB2S-N5311 carries an IP67 rating—fully dust-tight and capable of withstanding temporary water immersion up to 1m/30 minutes. Suitable for dusty and humid industrial environments.
Q5: What is the difference between GTB2S-N5311 and GTB2S-N5331?
A: The GTB2S-N5311 has a maximum detection range of 18 mm, while the GTB2S-N5331 reaches 36 mm. Both share the same G2 series housing, NPN output, IP67 rating, and M8 connector. Select based on the required sensing distance of your application.
AUMI – Authorized SICK Distributor in Vietnam. Genuine products, full CO/CQ, 24/7 technical support.
📞 Hotline: 0917 991 589 (Hanoi) | 0932 226 100 (Ho Chi Minh City)
📧 Email: [email protected]
🌐 Website: https://aumi.com.vn/
📍 Offices:
- Hanoi: B44, Garden Lot, Viet Hung Urban Area, Long Bien
- Ho Chi Minh City: Floor 2, HS Building, 260/11 Nguyen Thai Binh, Tan Binh District
- Da Nang: Floor 9, PV Bank Building, No. 2 30-4 Street, Hoa Cuong Ward
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