This document introduces the features and characteristics of the W 4-2 series photoelectric switches, including being small and light, not affected by light interference, and high reliability.
The SICK W 4-2 series includes proximity (WT), reflex (WL) and through‑beam (WS/WE) photoelectric switches designed for food‑processing, beverage, packaging, electronics and pharmaceutical applications. The switches are compact, robust and feature adjustable scanning distances, background suppression and LED red light sources.
Technical data sheets provide detailed specifications such as scanning range, supply voltage, current consumption, IP rating and environmental limits, together with accessories like cable receptacles and reflectors for flexible installation.
| Scanning distance | 4…130 mm, adjustable |
|---|---|
| Background suppression | adjustable from 20 mm |
| Light source | LED, red light |
| Supply voltage | 10…30 V DC |
| Current consumption | < 20 mA |
| Output current | max 100 mA |
| Response time | < 500 µs |
| Max switching frequency | 1000 s⁻¹ |
| Enclosure rating | IP 67 |
| Weight | ≈ 20 g |
| Housing material | PC, polycarbonate |
The scanning distance can be set between 4 mm and 130 mm.
All models use a red LED light source.
The switches have an IP 67 enclosure rating.