Photoelectric Proximity Sensor GTB6-P4231 SICK – PNP, 400 mm, IP67
Brief Overview:
The GTB6-P4231 is a photoelectric proximity sensor featuring advanced Background Suppression technology, enabling stable object detection up to a maximum distance of 400 mm. The sensor belongs to SICK’s compact G6 series, designed for space-saving installation and stable object detection in industrial automation. It is equipped with a precise PinPoint red LED, PNP output, M8 4-pin connector, and IP67 protection rating. It is an ideal solution for industrial automation applications, particularly on conveyor systems, packaging machines, and logistics setups requiring high reliability.
Overview of the Photoelectric Proximity Sensor GTB6-P4231
The GTB6-P4231 is specifically designed for precise object detection in demanding industrial environments. Its Background Suppression technology allows the sensor to differentiate objects based on distance rather than relying solely on surface reflectivity. This significantly reduces false detections caused by backgrounds or transparent/similar-colored materials.
With a highly focused PinPoint light spot (Ø 6 mm at 100 mm) and a switching frequency of 500 Hz, the sensor excels at detecting small, fast-moving objects on high-speed conveyor belts. Its ultra-compact design and robust IP67 rating ensure reliable operation under vibration, dust, and moisture, allowing flexible installation on robots, automated machinery, and production lines.
Key Features:
- Sensing range: 5–400 mm (90% remission); Standard: 50–220 mm
- Output: PNP, max. output current ≤ 100 mA (≤ 50 mA when UB > 24 V)
- Supply voltage: 10–30 V DC, current consumption 32 mA (no load)
- Protection: IP67, operating temperature –25°C to +55°C
- Connection: M8 4-pin connector; Adjustment: Mechanical spindle, 5 turns
Technical Specifications of GTB6-P4231
| Parameter |
Value |
| Model |
GTB6-P4231 |
| Part No. |
1079712 |
| Functional principle |
Photoelectric proximity sensor |
| Functional principle detail |
Background Suppression |
| Dimensions (W × H × D) |
12 × 31.5 × 21 mm |
| Sensing range max. |
5 mm – 400 mm (90% remission) |
| Sensing range (standard) |
50 mm – 220 mm |
| Light source |
PinPoint red LED, wavelength 625 nm |
| Light spot size |
Ø 6 mm at 100 mm distance |
| Sensitivity adjustment |
Mechanical spindle, 5 turns |
| Supply voltage (UB) |
10–30 V DC |
| Ripple |
±10% |
| Current consumption |
32 mA (no load) |
| Output type |
PNP |
| Switching mode |
Light/Dark switching (selectable via rotary switch) |
| Output current (max.) |
≤ 100 mA (≤ 50 mA when UB > 24 V) |
| Response time |
< 1.25 ms |
| Switching frequency |
500 Hz (light/dark ratio 1:1) |
| Circuit protection |
A (VS connections reverse-polarity protected); B (inputs and output reverse-polarity protected.); D (outputs overcurrent and short-circuit protected) |
| Housing material |
Plastic (ABS/PC) |
| Optical material |
PMMA |
| Connection |
Male connector M8, 4-pin |
| Weight |
60 g |
| Protection rating |
IP67 |
| Operating temperature |
–25°C … +55°C ( Temperature stability following adjustment +/-10 °C) |
| Storage temperature |
–40°C … +70°C |
| Certifications |
EU/UK/ACMA/Morocco CoC, China RoHS, cULus, DIN EN 62471 |
Source: SICK Datasheet GTB6-P4231 (Part No. 1079712). Download datasheet link
Applications of the GTB6-P4231 in Industry
- Packaging & Food Processing Lines: The 400 mm sensing range and 500 Hz switching frequency meet the demands of high-speed product detection on conveyors. Background suppression effectively eliminates false signals from conveyor backgrounds, especially with transparent or similarly colored packaging materials.
- Logistics & Material Sorting: The focused PinPoint light spot (Ø 6 mm at 100 mm) enables reliable detection of small objects on sorting conveyors. The standard sensing range of 50–220 mm suits most real-world installation distances in automated warehouses and conveyor systems.
- Electronics & Component Manufacturing: The Background Suppression principle enables reliable distance-based object detection with reduced influence from surface reflectivity variations.
- Food & Pharmaceutical Machinery: The IP67-rated housing ensures reliable operation in humid and dusty environments, including industrial washdown applications. The standard M8 4-pin connector simplifies installation, replacement, and maintenance.
- Robotics & Automation Equipment: The compact dimensions (12 × 31.5 × 21 mm) and low weight (60 g) enable direct integration into robotic arms or mechanical assemblies. Light/Dark switching mode is easily selected via the rotary switch without hardware changes.
Comparison: GTB6-P4231 vs GTB6-P4211
| Parameter |
GTB6-P4231 |
GTB6-P4211 |
| Part Number |
1079712 |
1052438 |
| Operating Principle |
Background Suppression |
Background Suppression |
| Output Type |
PNP |
PNP |
| Sensing Range max. |
5 – 400 mm (90% remission) |
5 – 250 mm (90% remission) |
| Connection |
Male connector M8, 4-pin |
Male connector M8, 4-pin |
| Protection Rating |
IP67 |
IP67 |
| Recommended Applications |
Conveyors, logistics, longer range |
Packaging machines, electronics, short range |
Conclusion:
- The GTB6-P4231 offers a longer sensing range (400 mm), making it ideal for long conveyors and logistics applications.
- The GTB6-P4211 is better suited for applications requiring high precision at shorter distances and more compact machinery.
Frequently Asked Questions (FAQ)
Q1. What is the operating principle of the GTB6-P4231?
The GTB6-P4231 operates on the Background Suppression principle, enabling accurate object detection with minimal influence from the background behind the target.
Q2. What is the maximum sensing range of the GTB6-P4231?
The sensor has a maximum sensing range of 5 mm – 400 mm (for objects with 90% remission). The standard sensing range is 50–220 mm.
Q3. Does the GTB6-P4231 have PNP or NPN output?
The GTB6-P4231 features PNP output, compatible with most industrial PLCs such as Siemens, Mitsubishi, Delta, and Keyence.
Q4. Is the GTB6-P4231 suitable for dusty and humid environments?
Yes. With an IP67 protection rating, the sensor operates reliably in dusty, high-humidity conditions and on washdown production lines.
Q5. What applications is the GTB6-P4231 suitable for?
It is ideal for conveyor systems, packaging machines, logistics, industrial robots, product sorting, and automated systems requiring precise object detection.
Contact to Purchase Photoelectric Proximity Sensor GTB6-P4231
AUMI – Official authorized distributor of SICK 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 Lot, 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 Road, Hoa Cuong Ward
