Product Overview
The WFS3-40N415 is a precision optical fork sensor designed for reliable label or object detection in high-speed industrial processes. Featuring a compact 3 mm fork width and 42 mm depth, it supports fast detection of thin labels and materials using infrared LED sensing and up/down teach-in adjustment.sick.commotionworld.com
Technical Specifications
| Feature | Specification |
|---|---|
| Optical Principle | Infrared LED with light/dark switching |
| Dimensions (W × H × D) | 10 mm × 25 mm × 64.3 mm sick.com |
| Fork Size | Width: 3 mm, Depth: 42 mm sick.commotionworld.com |
| Minimum Detectable | Labels ≥ 2 mm in gap sick.com |
| Teach-In Modes | 2-point static and dynamic via +/- buttons or external ET interface sick.commotionworld.com |
| Electrical Supply | 10–30 V DC, ripple <10% sick.com |
| Current Consumption | ~20 mA (unloaded) sick.com |
| Switching Output | NPN; light/dark selectable; up to 100 mA load sick.com |
| Performance | Switching frequency up to 10 kHz; response ≤50 µs; jitter ≈40 µs sick.commotionworld.com |
| Connection | M8, 4-pin male connector; protection class III; reverse polarity & short-circuit protected sick.com |
| Protection Rating | IP65; Housing of glass-fiber-reinforced PA; Weight ~36 g sick.com |
| Reliability (MTTFd) | 97 years sick.com |
| Temperature Range | −20 °C to +60 °C operating; −30 °C to +80 °C storage; ambient light immunity ≤10,000 lx sick.com |
| Certifications | CE, UKCA, China-RoHS, cULus (UL File No. NRKH.E191603) sick.com |
| Classification Codes | eCl@ss 27270909; ETIM EC002720; UNSPSC 39121528 sick.com |
Engineering Insights
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Compact Precision
With its narrow 3 mm fork and high-speed detection, this sensor excels in tracking small labels or objects on fast-moving platforms. -
Fast & Stable Operation
Up to 10 kHz switching frequency and sub-50 µs response enable accurate signal detection even in rapid machine cycles. Tight jitter specifications support timing-sensitive applications. -
Flexible Teach-In Configuration
Both static and dynamic teach modes via tactile buttons or ET input simplify setup and ensure reliable performance across label types. -
Robust for Industrial Use
With IP65 protection, durable materials, and built-in circuit safeguards, it is rugged enough for demanding manufacturing environments. -
Long-Term Dependability
A high MTTFd combined with solid certifications and protections ensures longevity and peace of mind for industrial deployments.
Suggested Product Page Description
SICK WFS3-40N415 Fork Sensor – 3 mm Label Sensor, Infrared, Teach-In, NPN Output
Engineered for precise label detection in compact spaces, this fork sensor offers a narrow 3 mm aperture and swift performance—switching up to 10 kHz with a response time under 50 µs. Teaching modes and light/dark detection are user-adjustable via buttons or ET input. With an IP65 rating, durable housing, and robust protection, it ensures reliable, long-term operation in fast-paced packaging or web control systems.
Key Highlights:
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3 mm fork width, 42 mm depth
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~2 mm minimum detectable label
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Infrared LED sensing with teach-in
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NPN, light/dark switchable output up to 100 mA
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Fast (10 kHz), precise (<50 µs response)
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Rugged IP65 enclosure with 97-year MTTFd
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Wide operating range (–20 °C to +60 °C), M8 connector
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