Key Features
Compact, Integrated Design: The U-shaped fork design houses both emitter and receiver, eliminating the need for separate alignment and ensuring consistent, reliable operation without adjustment.

Multi-Beam Detection: Features multiple parallel beams (a "light grid"), allowing it to detect very small objects that might pass through the gap of a standard fork sensor with a single beam.

High Precision: Capable of detecting minute objects and precise edges due to the tight spacing between the individual beams.

High Switching Frequency: Very fast response time enables the detection of small, fast-moving objects on high-speed production or packaging lines.

Contamination Indicator: Many models feature a built-in function to monitor lens contamination (e.g., dust, dirt), providing a warning signal before performance is compromised, which is critical for preventive maintenance.

Rugged Metal Housing: Constructed with a heavy-duty, nickel-plated brass housing, making it highly resistant to mechanical impact, vibration, and harsh industrial environments.

Fixed Cable Connection: This model is equipped with a fixed, attached cable for power and signal output.

3. Technical Specifications
Operating Principle: Fork Light Grid / Fork Sensor (through-beam within a single housing)

Light Source: Infrared LED (typically 880 nm)

Aperture Width (Gap): 40 mm (Distance between the two arms of the fork)

Beam Count: Multiple beams (creating a light grid for enhanced detection reliability)

Beam Spacing: Tight spacing (specific value to be confirmed from datasheet, e.g., 1.25mm or 2.5mm)

Output Type: Push-Pull (PP) / NAMUR (The "B4" in the part number often indicates a NAMUR-compliant output). This is a 2-wire output designed for connection to a separate amplifier or intrinsically safe interface in hazardous areas or for high noise immunity.

Supply Voltage: Requires an external amplifier or evaluating unit (e.g., SICK KFD2-SOT2-Ex2) for operation. The sensor itself is typically powered by 8...5 V DC from the amplifier.

Connection: Fixed cable (2-pin)

Housing Material: Nickel-plated brass

Ingress Protection Rating: IP67 (Dust-tight and protected against temporary immersion), suitable for demanding industrial environments.