Sick WTB12-3P2411 Photoelectric Sensor

The Sick WTB12-3P2411 Photoelectric Sensor offers advanced background suppression technology, ensuring stable detection of objects between 20 mm to 600 mm. Its high-performance infrared LED light source, operating at a wavelength of 850 nm, produces a sharp 15 mm × 15 mm light spot at 200 mm distance. This allows the sensor to maintain accuracy across a wide range of object surfaces and colors, making it ideal for dynamic environments like packaging lines, material handling systems, and assembly processes.

With a wide supply voltage range of 10–30 V DC and low current consumption of 55 mA, the sensor is energy-efficient while supporting fast response times of ≤ 330 µs and switching frequencies up to 1,500 Hz. It features a PNP digital output with complementary light/dark switching capabilities, offering flexible integration into PLCs and automation systems. Its rugged metal housing (15.6 mm × 48.5 mm × 42 mm) and IP66/IP67/IP69K protection rating make it resistant to dust, water, and high-pressure cleaning—ensuring consistent performance in harsh industrial settings. The standard M12, 4-pin male connector ensures quick and secure electrical connections.

The Sick WL4S-3F2130 Photoelectric Sensor is commonly used in close-range detection applications where space is limited and high-speed precision is required. It’s frequently installed on compact conveyor belts, pick-and-place systems, and robotic grippers to detect small components like bottle caps, washers, or fasteners with ease.

Maintenance engineers appreciate its ability to ignore background interference, reducing false triggers during fast object movement. Even when the object's position slightly shifts or tilts, this sensor provides stable detection without needing recalibration—saving time and minimizing line interruptions.

For engineering students and automation beginners, the WL4S-3F2130 serves as an excellent introduction to photoelectric sensing principles. It demonstrates how infrared detection, object reflectivity, and output response come together in real-world automation. Whether in training labs or high-speed factories, this model adds value through reliability, simplicity, and intelligent detection.