RS Components
Our website uses cookies and similar technologies to provide you with a better service while searching or placing an order, for analytical purposes and to personalise our advertising to you.

Sick Retro Reflective Photoelectric Sensor with Rectangular Sensor, 5 m Detection Range

2 In stock for delivery within 7 working day(s)
Add to Basket

Price (ex. GST) Each


(exc. GST)


(inc. GST)



RS Stock No.:
Mfr. Part No.:
COO (Country of Origin):
unitsPer unit
1 +$520.00


The WLG4S-3 is a retro-reflective sensor enclosed in a slim housing that reliably detects transparent objects. Even small gaps between objects, highly transparent thin films, and vials with flow marks and severe lens defects can be reliably detected. Setting the sensor requires a single press of the teach-in pushbutton. The sensor reliably adjusts for any changes to environmental conditions such as temperature, dust or dirt. The single-lens autocollimation system “sees” through even the smallest of openings. The PinPoint LED's small but intense light spot enables quick and easy alignment even when using the smallest reflectors. Plus, variants with IO-Link provide continuous diagnostics data.

At a glance

Continuous threshold adaption of the switching threshold compensates for environmental changes
Single-lens autocollimation optics
Simple setting either via teach-in pushbutton, cable or IO-Link
PinPoint LED technology with a small, highly visible, well-defined light spot enables high reserve levels when using small reflectors
Flexible sensor settings, monitoring, advanced diagnostics, and visualization thanks to IO-Link

Your Benefit

Optimal detection of any kind of transparent object
Quick and easy operation via the push of a button – automatic setting of the correct switching threshold
Less downtime due to a Continuous Threshold Adaption which compensates for changing environmental conditions, including temperature, dust and drift effects
The well-defined, highly visible intense light spot provides quick and reliable alignment
IO-Link provides easy data access from the PLC
Quick and easy configuration
Quick and easy integration using function blocks
Easy device replacement and identification


Tears in transparent films


Product details cover the whole product family. For details on the specifications for this individual product, please refer to the datasheet.

Sensor StyleRectangular
Detection TypeRetro Reflective
Detection Range5 m
Output TypePNP
Electrical ConnectionCable with connector
Maximum DC Voltage30V
Terminal Type4-pin
Light SourcePinPoint LED
IP RatingIP66, IP67, IP68, IP69K
Response Time500 μs
Housing MaterialStainless Steel
SeriesW4S-3 Inox Glass
Maximum Operating Temperature+60°C
Minimum Operating Temperature-30°C