SICK GTB2S-E1331 Photoelectric Sensor 36mm NPN – Reliable Small Object Detection

• GTB2S-E1331 is a compact background suppression photoelectric proximity sensor from SICK, utilizing 640 nm red PinPoint LED technology to accurately detect small objects in industrial environments.
• The sensor provides a sensing range of up to 36 mm and supports reliable small-object detection through background suppression technology, minimizing interference from reflective backgrounds.
• Its compact housing (7.7 × 21.8 × 13.5 mm) and IP67 protection rating ensure stable operation in confined spaces and harsh environments exposed to dust and moisture.
• Featuring an NPN dark switching output, response time < 0.6 ms, and an 800 Hz switching frequency, the sensor performs reliably in high-speed applications.
• GTB2S-E1331 suits packaging, logistics, electronics assembly, quality inspection, and industrial robotic systems, where applications require reliable detection of small objects with high operational accuracy.

The GTB2S-E1331 is a compact SICK photoelectric proximity sensor with a 5–30 mm detection range (max. 36 mm), red PinPoint LED, background suppression principle, NPN dark switching output, and IP67 protection. Ideal for detecting small objects in production lines, packaging, and automation. Genuine product available at AUMI Vietnam.

Overview of the SICK GTB2S-E1331 Photoelectric Sensor

The GTB2S-E1331 belongs to the SICK G2 series – a compact standard-profile photoelectric sensor designed for reliable small-object detection in industrial settings. It uses the background suppression principle, reliably detecting objects in front of the sensor while ignoring backgrounds beyond 38 mm, making it excellent for applications where target objects are positioned in front of high-reflectance backgrounds. The red PinPoint LED (640 nm) generates a focused Ø3 mm spot at 15 mm distance for precise detection. The sensor also carries a special designation for detecting small objects per SICK standards.

5 Key Specifications:

•       Detection range: 5–30 mm (standard), max. 36 mm (90% remission)
•       Light type: Red PinPoint LED, wavelength 640 nm
•       Output: NPN, dark switching mode
•       Enclosure rating: IP67 – dustproof and waterproof
•       Compact dimensions: 7.7 × 21.8 × 13.5 mm, suitable for tight installation spaces

Technical Specifications – SICK GTB2S-E1331 36mm NPN

Data from SICK GTB2S-E1331 Data Sheet

Industrial Applications of the SICK GTB2S-E1331

With its compact design, 36 mm detection range, and superior background suppression, the GTB2S-E1331 is an ideal choice for a wide range of industrial applications:

•       Packaging & logistics lines: Detects products on high-speed conveyors (800 Hz switching frequency) while suppressing reflective conveyor backgrounds. Compact size makes installation straightforward between machine components.
•       Small object detection in manufacturing: Dedicated small-object detection capability for detecting components such as screws, pins, and PCBs on assembly lines. The Ø3 mm light spot ensures precise positional detection.
•       Food & beverage industry: IP67 rating ensures full dust protection and resistance to water spray for periodic cleaning. Photobiological safety certification (DIN EN 62471) ensures compliance for food-adjacent applications.
•       Machine control & robotics: Dark switching NPN output integrates easily with PLCs and robot controllers. Response time < 0.6 ms ensures reliable detection in high-speed applications.

Comparison: GTB2S-E1331 vs Similar Models

Choose the GTB2S-E1331 when: you need a wider detection range (up to 36 mm), dark switching NPN output, general small-object detection, or when high reliability (MTTFD 3,378 years) is required.

Frequently Asked Questions – SICK GTB2S-E1331 (FAQ)

Q1: How much does the SICK GTB2S-E1331 cost?

A: Pricing depends on quantity and timing. Contact AUMI at hotline 0917 991 589 for the best quote and free technical consultation.

Q2: Where can I buy the genuine SICK GTB2S-E1331 in Vietnam?

A: AUMI is the official SICK distributor in Vietnam, supplying the GTB2S-E1331 with full CO/CQ documentation, genuine warranty, and 24/7 technical support. Contact hotline 0917 991 589 or visit aumi.com.vn.

Q3: What industries use the GTB2S-E1331?

A: The sensor is widely used in food packaging, logistics, electronics assembly, quality control, and industrial robotics – any application requiring reliable detection of small objects.

Q4: Does the GTB2S-E1331 come with a warranty?

A: Yes. When purchased through AUMI, the GTB2S-E1331 comes with a full official SICK warranty. Our technical team is available throughout the product lifecycle.

Q5: What does dark switching mean for the GTB2S-E1331?

A: Dark switching (Dark ON mode) is a mode in which the sensor output is activated (ON) when the receiver is in a “dark” state, meaning that light does not return to the receiver as normal. This usually occurs when an object blocks or absorbs the light beam.

For BGS (Background Suppression) photoelectric sensors, Dark switching typically means that the output turns ON when an object is present within the sensing range (before the background suppression threshold). This is the opposite of Light switching (Light ON mode), where the output turns ON when the receiver detects reflected light.

AUMI – Official GTB2S-E1331 SICK Distributor in Vietnam. Genuine warranty, 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

🔗 Official Datasheet

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