Sick GTB6-P5211S78 Photoelectric Sensor
Sick GTB6-P5211S78 photoelectric sensor provides background suppression detection with 140 mm sensing range, PNP output, and 6 mm light spot. The GTB6-P5211S78, a Sick 6 mm Photoelectric Sensor, includes PinPoint LED light source, 650 nm wavelength, and IP67 enclosure rating. It supports 1000 Hz switching frequency, < 625 µs response time, light/dark switching, M8 3-pin connector, and operates on 10–30 V DC supply within Sick, Sick Photoelectric Sensors, and the G6 series.
| Brand | Sick |
| Product Type | Photoelectric Sensors |
| Model Number | GTB6-P5211S78 |
Sick GTB6-P5211S78 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Functional principle | Photoelectric proximity sensor |
| Functional principle detail | Background suppression |
| Sensing range max. | 5 mm ... 250 mm |
| Sensing range | 35 mm ... 140 mm |
| Light source | PinPoint LED |
| Type of light | Visible red light |
| Light spot size (distance) | Ø 6 mm (100 mm) |
| Wave length | 650 nm |
| Adjustment | Mechanical spindle, 5 turns |
| Supply voltage UB | 10 V DC ... 30 V DC |
| Ripple | ± 10 % |
| Current consumption | 30 mA 3) |
| Protection class | III |
| Digital Output type | PNP |
| Switching mode | Light/dark switching |
| Switching mode selector | Selectable via light/dark selector |
| Signal voltage PNP HIGH/LOW | VS - (≤ 3 V) / approx. 0 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 | Cable with connector M8, 3-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 GTB6-P5211S78 Sick 6 mm Photoelectric Sensor is a background suppression photoelectric proximity sensor used for short-range industrial detection. It offers 140 mm sensing range, operates with a 650 nm PinPoint LED, and delivers PNP output with 1000 Hz switching frequency. As part of the G6 series, the GTB6-P5211S78 ensures stable detection in automation systems.
The GTB6-P5211S78 is applied in conveyors, packaging machines, assembly lines, and material handling systems where precise object detection is required. Background suppression enables accurate sensing even with varying object colors or surfaces, while light/dark switching improves integration flexibility. The compact rectangular design supports easy installation in control panels.
The Sick GTB6-P5211S78 Photoelectric Sensor provides consistent sensing performance with defined electrical characteristics and IP67 protection. The GTB6-P5211S78 within the G6 series supports reliable operation in industrial environments. As part of the Sick sensor portfolio, it is suitable for automation tasks requiring stable and repeatable detection.

