WFM120-120P311 Fork Sensors – SICK Sensor

Product Overview

• Sensor Type: Optical Fork Sensor (WFM Series).
• Fork Width: 120 mm.
• Fork Depth: 124 mm.
• Switching Output: PNP.
• Switching Mode: Light switching.
• Adjustment: None (Fixed sensitivity for plug-and-play operation).
• Connection: M8 male connector, 3-pin.

Product Description

The SICK WFM120-120P311 (Part Number 6037833) is a high-performance fork sensor engineered for precision and reliability in demanding industrial automation environments. Operating on a through-beam principle, this sensor integrates both the sender and receiver into a single, rugged U-shaped housing, ensuring perfect optical alignment at all times. With a substantial fork width of 120 mm and a depth of 124 mm, it is specifically designed to detect objects or labels on wide conveyor systems or within complex machinery.

A defining characteristic of this model is its “plug-and-play” design; it requires no manual sensitivity adjustments, which drastically reduces commissioning time and prevents operational errors caused by improper calibration. The sensor employs a visible red LED light source, allowing for easy alignment and immediate status verification via the yellow output indicator. Designed for high-speed processes, the WFM120-120P311 boasts a switching frequency of 4 kHz and a response time of ≤ 125 µs. Its durable aluminum housing is IP67-rated, providing robust protection against dust and moisture, making it an essential component for high-speed labeling, packaging, and logistics applications.

Key Performance Features

• High-Speed Switching: 4,000 Hz switching frequency ensures accuracy in rapid production cycles.
• Ultra-Fast Response: Response time of ≤ 125 µs for instantaneous object detection.
• Plug-and-Play Installation: Pre-set sensitivity eliminates the need for manual adjustment or “Teach-in” procedures.
• Small Object Detection: Capable of detecting a Minimum Detectable Object (MDO) of 0.8 mm.
• Rugged Construction: IP67 enclosure rating allows for operation in harsh, wash-down, or dusty environments.
• Visible Alignment: Bright red light spot facilitates quick and accurate sensor positioning.

Ideal Applications

• Labeling Processes: Detection of labels on wide webs or high-speed dispensers.
• Packaging Lines: Monitoring the presence of products in containers or trays.
• Small Part Detection: Counting or triggering small components in vibratory feeders and assembly lines.
• Print Mark Triggering: High-speed triggering for printing, coding, and marking systems.
• Logistics & Material Handling: Object detection on conveyor belts where alignment must remain stable.

Features