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Flat and reflective objects
Foreground-suppression and V-optics variants can address thin, highly reflective or transparent targets when the application geometry matches the selected sensor.
SICK W4F Photoelectric Sensors
SICK W4F miniature photoelectric sensors combine compact housings with specialized optics for background suppression, foreground suppression, transparent-object detection, retro-reflective sensing and through-beam applications.
View productsSICK W4F photoelectric sensors
Compare exact W4F type codes by sensing principle, optics, range, switching behavior, connection and IO-Link functionality.
Showing 10 of 10
Industrial automation component
SICK W4F DoubleLine Background-Suppression Sensor WTB4FT-32161120A00
WTB4FT-32161120A00
New Original
$999.00
In Stock
Industrial automation component
SICK W4F DoubleLine Background-Suppression Sensor WTB4FT-38161120A00
WTB4FT-38161120A00
New Original
$999.00
In Stock
Industrial automation component
SICK W4F Foreground-Suppression IO-Link Sensor WTF4FD-22162220A00
WTF4FD-22162220A00
New Original
$999.00
In Stock
Industrial automation component
SICK W4F Foreground-Suppression Sensor WTF4FD-21311220ZZZ
WTF4FD-21311220ZZZ
New Original
$999.00
In Stock
Industrial automation component
SICK W4F Photoelectric Sensor WTB4FP-2216R150A00
WTB4FP-2216R150A00
New Original
$999.00
In Stock
Industrial automation component
SICK W4F Polarized Retro-Reflective IO-Link Sensor WLD4FP-22162130A00
WLD4FP-22162130A00
New Original
$999.00
In Stock
Industrial automation component
SICK W4F Polarized Retro-Reflective Sensor WLD4FP-213121A0ZZZ
WLD4FP-213121A0ZZZ
New Original
$999.00
In Stock
Industrial automation component
SICK W4F Through-Beam Sensor Set WSE4FP-22162100A00
WSE4FP-22162100A00
New Original
$999.00
In Stock
Industrial automation component
SICK W4F V-Optics IO-Link Sensor WTV4FE-1H162120A00
WTV4FE-1H162120A00
New Original
$999.00
In Stock
Industrial automation component
SICK W4F V-Optics Photoelectric Sensor WTV4FE-213111A0ZZZ
WTV4FE-213111A0ZZZ
New Original
$999.00
In Stock
W4F sensing technologies
Choose the W4F sensing principle and optics for the object, background and installation geometry. The complete type code also defines the switching mode and connection.
WTB4F background suppression
Photoelectric proximity sensors for object detection with background suppression, including MultiSwitch and DoubleLine variants.
WTV4F and WTF4F optical experts
V-optics for reflective or transparent targets and foreground-suppression variants for flat objects on a defined background.
WLD4F retro-reflective sensors
Polarized retro-reflective variants for longer detection paths using a suitable reflector.
WSE4F through-beam sensors
Separate sender and receiver variants for high operating reserve and longer sensing distances.
How to select a SICK W4F sensor
Start with the sensing task, then verify range, target behavior, output logic, connection and communication for the exact type code.
W4F devices can share the same compact housing while using different optics, ranges, outputs and connections. Verify the full type code and SICK part number before ordering.
- 01
Match the sensing principle
Select proximity, retro-reflective or through-beam sensing according to the available mounting positions and whether a reflector or separate receiver is practical.
- Target and background
- Mounting geometry
- Required operating reserve
- 02
Choose the optical technology
Use the W4F variants intended for flat, reflective, transparent, perforated or uneven targets rather than relying only on the maximum range.
- Background or foreground suppression
- V-optics
- DoubleLine or MultiSwitch
- 03
Confirm output and connection
Check light or dark switching, PNP/NPN behavior, connector or cable style, pin count and the exact wiring diagram.
- Switching mode
- Output type
- M8 connector or cable
- 04
Decide whether IO-Link is required
Selected W4F sensors expose configuration, process values and diagnostic information through IO-Link while also supporting conventional switching operation.
- SIO or IO-Link
- Process data
- Diagnostic functions
Object-detection applications
SICK documents W4F variants for compact automation tasks involving difficult surfaces, limited installation space and connected diagnostics.
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Perforated and uneven objects
DoubleLine variants use two line-shaped light spots to stabilize detection of objects with openings, recesses or irregular surfaces.
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Presence and position monitoring
Background-suppression and MultiSwitch variants support compact presence, position and two-threshold detection tasks.
Documentation and resources
Use current SICK documentation to compare sensing technologies and confirm each exact type code.
W4 product overviewCurrent family scope, technical overview and available W4 sensing technologies.W4F product informationApplication examples, optical technologies, Smart Sensor functions and IO-Link context.WTB4FP-2216R150A00 data sheetExact ordering and technical data for SICK part number 1119989.
SICK W4F questions
Key distinctions for identifying and selecting products in this collection.
What is included in the SICK W4F collection?
This collection covers W4F miniature photoelectric sensors, including proximity, retro-reflective and through-beam variants. Other SICK sensor families and installation accessories are handled separately.
Is the W4F family name enough to order a sensor?
No. The complete type code identifies the sensing technology, switching behavior and electrical connection. The numeric SICK part number provides a second ordering check.
Do all W4F sensors provide the same IO-Link functions?
No. Communication, process-data and Smart Sensor functions vary by exact type. Check the individual data sheet before integration.
Need help sourcing a SICK W4F sensor?
Send the complete SICK type code or numeric part number, quantity, condition and delivery destination for a tailored quotation.
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