SICK WF2-40B410 6028428 WF Series Fork Sensor 2mm PNP/NPN M8

SICK WF2‑40B410 is a miniature optical‑fork sensor for non‑contact detection of small objects, labels, web edges and transparent materials without requiring alignment. Emitter and receiver are factory‑aligned inside the same housing for immediate operation. A fork width of 2 mm and fork depth of 42 mm are combined with a 0.2 mm minimum detectable object and a fast 100 µs response time, making this sensor suitable for high‑speed detection tasks in packaging, printing, material handling and automation lines. Integrated plus/minus buttons allow sensitivity and switching mode adjustment on‑site.

Applications:

• Label detection in labelling machines and printing presses (transparent, translucent or metallic labels on carrier film)

• Web edge and web break detection for material webs (paper, film, foil, non‑woven)

• Counting small parts, pins, screws or pills in bulk material feeders and packaging machines

• Flat or high‑speed object detection on conveyor lines and automated assembly cells

• Gap detection for stamped parts, electronic components and thin profile objects

Core Specifications:

• Functional principle: Optical detection principle (through‑beam fork sensor)

• Housing design: Fork‑shaped

• Fork width: 2 mm

• Fork depth: 42 mm

• Minimum detectable object (MDO): 0.2 mm

• Light source: LED, infrared light (λ = 850 nm)

• Supply voltage: 10 V DC … 30 V DC

• No‑load current consumption: 40 mA

• Switching output: PNP/NPN (dual output, selectable)

• Switching mode: Light/dark switching (selectable via button)

• Output current: ≤ 100 mA

• Response time: ≤ 100 µs

• Switching frequency: 10 kHz

• Adjustment: Plus/minus buttons (sensitivity, light/dark switching, key lock)

• Connection type: Male connector M8, 4‑pin

• Enclosure rating: IP65

• Housing material: Aluminium

• Dimensions (W × H × D): 10 mm × 32 mm × 57 mm

• Weight: approx. 49 g

Advanced Specifications:

• Supply voltage ripple: ≤ 10 %

• Reverse polarity protection: Yes

• Short‑circuit protection: Yes

• Voltage drop: ≤ 2 V

• Circuit protection: Against transient overvoltage

• Ambient operating temperature: –20 °C … +60 °C

• Storage temperature: –40 °C … +70 °C

• Shock resistance: According to IEC 60068‑2‑27

• Vibration resistance: According to IEC 60068‑2‑6

• Electromagnetic compatibility: According to EN 60947‑5‑2

• Protection class: III

• Safety class: 3

• RoHS compliant

System Integration:

• Belongs to SICK WF series of optical fork sensors.

• Mounts via through‑holes (screw mounting) using suitable M3 screws; no optical alignment required.

• M8 4‑pin male connector mates with standard industrial M8 female cables (e.g., YF8U14‑xxxVB3XLEAX series).

• Select light‑on or dark‑on switching mode via the plus/minus buttons.

• The infrared light source (850 nm) provides high immunity to ambient light and allows detection of transparent materials.

Standards & Compliance:
Refer to manufacturer official documentation for detailed certification and compliance information (CE, cULus, RoHS, UKCA).

Related Products:

• WF2‑60B416 – 2 mm fork width, 59 mm fork depth, 2‑point teach‑in adjustment

• WF2‑95B410 – 2 mm fork width, 95 mm fork depth, plus/minus button adjustment

• WF5‑60B41CA00 – 5 mm fork width, 60 mm fork depth, push‑pull output, IP65

• YF8U14‑020VB3XLEAX – M8 straight female connector cable, 4‑pin, 2 m, PVC

• YG8U14‑020VB3XLEAX – M8 angled female connector cable, 4‑pin, 2 m, PVC

• BEF‑WF – mounting bracket for flexible sensor positioning