Overview

The Sick WLG4S-3F2234 1042084 is a miniature photoelectric retro-reflective sensor designed for precision object detection in industrial automation. This Sick WLG4S-3F2234 sensor uses autocollimation optics and polarization filters to enable reliable long-range detection of objects, materials, and label marks without a separate retroreflector (minimum distance functionality). The compact rectangular housing and M8 4-pin connector make installation straightforward in tight mounting spaces.

Key Features

• Retro-reflective with autocollimation: Detects objects at distances from 0.01 m to 5 m (sensing range with reflector); 0–3 m practical range without separate reflector.
• PinPoint LED light source: Visible red light at 650 nm wavelength with tight ø45 mm spot size at 1.5 m, enabling precision detection of small targets and transparent materials.
• PNP dark switching output: Switching mode suitable for standard industrial control circuits and PLCs.
• AutoAdapt technology: Automatic threshold adjustment compensates for dust, aging, and environmental variations.
• M8 connector: Standard 4-pin M8 male connector for plug-and-play integration; cable and single teach-in button for on-site adjustment.
• Compact housing: ABS rectangular enclosure fits confined installation areas.

Technical Specifications

Operating Voltage: 10–30 VDC | Light source: PinPoint LED, 650 nm visible red | Sensing range (with reflector PL80A): 0.01–5 m | Sensing range (without reflector): 0–3 m | Output type: PNP, Dark switching | Connection: Male M8 4-pin connector | Switching time: Per datasheet limits | LED service life: ~100,000 h @ 25 °C | Housing material: ABS | Response time: Per manufacturer specifications | Operating temperature: Per datasheet | Protection: Per manufacturer specifications.

Typical Applications

• Factory automation and assembly line presence detection
• Transparent object detection (bottles, films, glass)
• Label and mark detection on conveyor lines
• Distance measurement and ranging
• Level detection and threshold switching
• Quality control and sorting systems

Compatibility & Replacements

Compatible With

• Allen-Bradley ControlLogix, CompactLogix, MicroLogix PLC systems
• Siemens S7-1200, S7-1500 controllers
• Mitsubishi FX and Q series PLCs
• Omron CP/CJ series controllers
• Standard 10–30 VDC industrial control circuits
• Any PLC or control system with PNP digital input capability

Replaces / Drop-In Replacement For

Verify exact model compatibility with your system integrator. The Sick WLG4S-3F2234 is the current production model; no specific legacy part numbers are confirmed as direct replacements without engineering review.

Works With

• Studio 5000 (Allen-Bradley) — standard discrete input module integration
• TIA Portal (Siemens) — via S7 digital input configuration
• GX Works (Mitsubishi) — standard I/O programming
• CX-Programmer (Omron) — standard digital input assignment
• Industrial Ethernet networks (EtherNet/IP, PROFINET) via gateway or I/O module
• Safety-rated systems: Verify with Sick technical support for SIL/PLd applications