Key Features & Strengths:

High Power & Long Sensing Range: Through-beam sensors offer the longest possible range and highest excess gain (light energy) of any photoelectric mode. The WT24-2B420 has a range of up to 15 meters (approx. 49 feet), making it suitable for large-scale applications.

Exceptional Reliability: Provides highly stable and reliable object detection. It is largely immune to environmental factors like target object color, surface finish, or reflectivity. If the beam is broken, the object is detected—it's that simple.

High Immunity to Ambient Light: Uses modulated infrared light (880 nm), which allows it to filter out ambient light from factory lighting, sunlight, or other sources, preventing false triggers.

Robust Metal Housing: The transmitter and receiver are housed in heavy-duty, nickel-plated brass housings. This makes them highly resistant to physical impact, chemicals, oils, and mechanical stress.

High Protection Rating: Features an IP67 protection rating, ensuring complete protection against dust and temporary immersion in water, ideal for harsh and dirty industrial settings.

Precise Alignment Aids: Equipped with alignment aids (visual or acoustic indicators on some models) to simplify the process of aligning the transmitter and receiver over long distances.

Fixed-Cable Connection: The model designation "2B420" typically indicates a fixed cable connection (e.g., 2m PVC cable), providing a secure and reliable wiring solution.

Technical Specifications (General):

Sensing Principle: Through-Beam (Sender and Receiver)

Light Source: Modulated infrared light, 880 nm

Sensing Range: Up to 15 m (50 ft)

Operating Voltage: 10...30 V DC

Output Type: Typically DC NPN (sinking) or DC PNP (sourcing) output. The receiver's output switches when the beam is interrupted.

Output Function: Dark-On (normally closed) or Light-On (normally open), often configurable.

Housing Material: Nickel-plated brass

Protection Class: IP67

Connection: Fixed cable

Typical Applications:
The WT24-2B420 is designed for demanding applications where long range and maximum reliability are critical:

Object detection on large conveyor systems and overhead monorails

Pallet detection in warehouses and logistics centers

Door control and monitoring (e.g., on garage doors, industrial gates)

Overhead height detection for collision prevention

Counting large objects in material handling

Security and access control systems