Sick VT12T-2P430 Photoelectric Sensor

The VT12T-2P430 from Sick is a robust photoelectric proximity sensor with an energetic sensing principle and background suppression, offering consistent performance in reflective and variable-light conditions. Engineered in a sleek 12 mm cylindrical metal housing with a 65.5 mm length, it is perfectly suited for applications where space efficiency and mechanical durability are critical. This sensor offers a sensing range of 2 mm to 300 mm, with a maximum detection capability up to 340 mm. It projects a broad infrared light beam with a 28 mm spot size at 300 mm, emitted via a high-stability 880 nm LED, making it well-suited for diffuse object detection even under low ambient visibility.

Installation is made simple with a standard M12 male connector (4-pin) and PNP switching output. Engineers can toggle light/dark switching modes via control input C, enabling flexible adaptation across automation scenarios. The sensor operates at a stable 10 V DC to 30 V DC with ripple tolerance of ±10%, drawing just 20 mA. A fast response time of 1.25 ms and a switching frequency of 400 Hz ensures reliable performance in fast-cycle machines. The device features a single teach-in button for easy range configuration, making commissioning fast and intuitive for field technicians.

Encased in a nickel-plated brass and PA housing with PMMA optics, the VT12T-2P430 meets IP67 enclosure standards, offering protection from dust, water jets, and mechanical impact. Lightweight at only 18 g, this sensor is trusted for integration into compact, high-speed systems in industries such as logistics, bottling, and electronics.

The Sick WL4S-3F2130 Photoelectric Sensor is commonly used in automated material handling and quality control systems. It is highly effective in detecting the presence, position, or passage of objects on conveyors—ensuring that parts are properly aligned before processes such as filling, sealing, or labeling begin.

With background suppression and a high switching frequency, the sensor eliminates false positives from shiny machine parts or fluctuating lighting conditions. Maintenance teams favor it for its reliability and ease of alignment, especially during retrofits or urgent replacements. Its compact housing and visible laser spot simplify setup, while the IP67-rated design ensures uninterrupted operation in dusty or wet environments common in FMCG, pharma, and food processing industries.

For engineering students and automation trainees, the WL4S-3F2130 is an excellent tool to understand core sensor technologies. It introduces concepts like proximity sensing, switching logic, and real-time PLC integration—giving future engineers firsthand insight into how simple sensors play a crucial role in advanced automation.