Sick GTB6-F7421V Photoelectric Sensor
Sick GTB6-F7421V photoelectric sensor provides 5 mm to 420 mm sensing range with infrared light source, PNP output, and 500 Hz switching frequency. The GTB6-F7421V, a Sick IR Photoelectric Sensor, includes Ø 8 mm light spot, 850 nm wavelength, and IP67/IP69K enclosure rating. It supports < 1.25 ms response time, background suppression sensing, stainless steel housing, 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-F7421V |
Sick GTB6-F7421V Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Functional principle | Photoelectric proximity sensor |
| Functional principle detail | Background suppression |
| Sensing range max. | 5 mm ... 420 mm |
| Sensing range | 50 mm ... 200 mm |
| Light source | LED |
| Type of light | Infrared light |
| Light spot size (distance) | Ø 8 mm (100 mm) |
| Wave length | 850 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 | - |
| Signal voltage PNP HIGH/LOW | VS - (≤ 3 V) / approx. 0 V |
| Output current Imax. | ≤ 100 mA 4) |
| Response time | < 1.25 ms 5) |
| Switching frequency | 500 Hz 6) |
| Housing | Rectangular |
| Dimensions (W x H x D) | 15 mm x 44 mm x 22 mm |
| Connection | Cable with M12 male connector, 4-pin |
| Housing material | Stainless steel, Stainless steel V4A (1.4404, 316L) |
| Front screen material | Plastic, PMMA |
| Enclosure rating | IP67, IP69K |
| Ambient operating temperature | –25 °C ... +55 °C |
| Ambient temperature, storage | –30 °C ... +75 °C |
| Weight | 40 g |
The GTB6-F7421V Sick IR Photoelectric Sensor is designed for short to medium range detection using background suppression technology. It provides 5 mm to 420 mm sensing range, operates with PNP output, and uses an infrared LED light source with 500 Hz switching frequency. As part of the G6 series, the GTB6-F7421V is used in industrial automation systems requiring consistent sensing.
The GTB6-F7421V is used in conveyors, packaging machines, and assembly lines where reliable object detection is required. Its infrared sensing ensures stable detection even under varying lighting conditions. The stainless steel housing with IP69K rating supports operation in washdown and harsh industrial environments.
The Sick GTB6-F7421V Photoelectric Sensor provides defined sensing and electrical characteristics for industrial use. The GTB6-F7421V in the G6 series supports repeatable detection with stable output signals. As part of the Sick sensor range, it is used in applications requiring durability, consistent performance, and accurate object detection.

