The SICK WS9L-D430 is a compact, rectangular photoelectric sensor operating on 10 to 30 V DC with a 4-pin connection. Though discontinued, it remains a basic and reliable rectangular-style photoelectric device suited for legacy systems, typically employed where such form factors and electrical interfaces are required.

he SICK WE9L-P430 is a compact through-beam photoelectric sensor that utilizes a visible red laser (Class 2) for precise long-range detection up to 50 m. It provides straightforward teach-in setup, PNP light/dark switching output, and robust performance in industrial settings. Despite being discontinued, it remains a reliable option for demanding sensing applications.

The SICK WLG4S-3P3132 is a compact retro-reflective photoelectric sensor with autocollimation optics, enabling detection even without a separate reflector. It uses a visible red PinPoint LED, offers a slim rectangular design, incorporates a single teach-in button for easy configuration, and supports AutoAdapt for stable detection of transparent objects. The sensor delivers fast PNP light-switching performance with built-in protection, all in a durable IP67-rated housing suitable for industrial environments.

The SICK WL4-3P3130 is an ultra-compact retro-reflective photoelectric sensor that uses a visible red PinPoint LED and dual-lens optics with polarization filters for accurate detection. It offers a sensing range from 0.02 m to 3.5 m (up to 4.5 m max with a PL80A reflector), quick PNP light-switching output, and fast response in a sleek slim housing ideal for tight installations.

The SICK WTV4-3N1322S01 is a compact background-suppression photoelectric proximity sensor equipped with V-optics for precise detection of shiny or uneven surfaces. It features an infrared PinPoint LED light source, a single teach-in button for easy setup, and delivers reliable NPN light-switching output, making it ideal for tight spaces and industrial environments.

The SICK WTB12-3P2431 is a compact background-suppression photoelectric proximity sensor using visible red LED light. It delivers reliable detection across a range from 20 mm to 350 mm. The sensor features a 5-turn potentiometer for precise adjustment, PNP complementary (light/dark-switching) output, fast response, and is built for demanding environments with its robust metal housing and IP66/67/69K protection.

The SICK WLL190T-2N432 is a compact standalone fiber-optic amplifier designed for both through-beam and proximity detection applications. It provides flexible sensing from near zero up to 4 m in through-beam mode or 480 mm in proximity mode. Featuring visible red LED light, a dual 4-digit display showing set and actual values, menu-controlled teach-in via button, programmable time functions, and a rugged IP66-rated housing, this high-performance fiber amplifier is ideal for industrial automation scenarios requiring precise and versatile object detection.

The SICK WTB12-3P2411 is a compact background-suppression photoelectric proximity sensor with infrared light and PNP output, offering a versatile sensing range from 20 mm to 600 mm. Equipped with a 5-turn potentiometer for adjustment, fast switching performance, and housed in a rugged metal enclosure rated to IP66/IP67/IP69K, it is designed for reliable detection in demanding industrial applications.

The SICK WL4S-3P3132 is a compact retro-reflective photoelectric sensor featuring autocollimation optics so it can detect objects without the need for a reflector. It uses a visible red PinPoint LED light source and includes a single teach-in button for easy setup. The sensor offers fast, light-only switching (PNP), operates over a wide supply range, and delivers high-speed response—all within a rugged, IP67-protected plastic housing suitable for industrial environments.

The SICK WL27-3P2431 is a compact retro-reflective photoelectric sensor equipped with a dual-lens system for detecting objects at very short distances—even without a reflector. It emits a visible red LED beam and delivers precise, high-speed detection in a robust ABS housing rated IP69K. The sensor supports PNP light/dark switching output, features a multi-turn potentiometer for fine sensitivity adjustment, and includes comprehensive electrical protection, making it well suited for demanding industrial environments.