Overview
The Sick WTR2-N551S06 photoelectric sensor is a diffuse-type detection device built for demanding industrial automation and motion control applications. Part of Sick’s ZoneControl photoelectric sensor family, the Sick WTR2-N551S06 delivers precision sensing performance for conveyor systems, packaging machinery, and factory automation. Designed by Sick, a leading manufacturer of intelligent sensors and sensor solutions, this unit provides accurate object presence detection without the complexity of retroreflective setups.
Key Features
- Diffuse detection mode — detects objects without retroreflectors or separate receivers
- ZoneControl photoelectric sensor line — proven reliability in industrial environments
- Compact form factor suitable for space-constrained installations
- Standard industrial photoelectric interface for straightforward integration
- New condition — factory-sealed without connector cable (cable sold separately)
Technical Specifications
The following specifications apply to the Sick WTR2-N551S06 diffuse photoelectric sensor:
- Manufacturer: Sick
- Part Number: WTR2-N551S06
- Sensor Type: Diffuse Photoelectric
- Product Line: ZoneControl
- Condition: New
- Cable: Not included
- Weight: Approximately 2.0 lbs
Typical Applications
The Sick WTR2-N551S06 photoelectric sensor is suitable for a range of industrial automation tasks:
- Conveyor system presence detection and object counting
- Packaging machinery — part detection and positioning
- Manufacturing equipment — workpiece identification and alignment
- Warehouse and logistics automation
- General factory floor object detection where diffuse sensing is appropriate
Compatibility & Replacements
Compatible With
- Standard 24 VDC industrial control systems
- PLC inputs and automation controllers accepting photoelectric sensor outputs
- Sick sensor families and ZoneControl product ecosystem
- Industrial automation networks and fieldbus systems supporting standard I/O
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Sick WTR2-N551S06 may serve as a replacement for earlier generations of Sick diffuse photoelectric sensors; consult technical documentation for your specific application.
Works With
- Standard photoelectric sensor wiring and M12 connector interfaces
- Generic PLC analog input modules and digital I/O cards
- Automation software platforms accepting standard sensor outputs
- Industrial control and monitoring systems












