Delock Forked Photoelectric Sensor 5 mm Slot U-Type with 4 Open Cable Ends PNP Light/Dark Selectable 2 m

On automated packaging lines, label edges must be detected precisely and reliably. The Delock 91873 forked photoelectric sensor solves this with a 5 mm slot that straddles the carton edge. Its infrared beam is interrupted by the label, triggering a PNP output that signals the PLC to activate the labeling head. With selectable light-on/dark-on logic and a fast 0.1 ms response, it ensures accurate detection even at high line speeds.

Key specifications

• Sensor type: Forked photoelectric sensor (through-beam principle)
• Slot width: 5 mm; slot depth: 10 mm
• Light source: Infrared LED, 880 nm
• Output: PNP, light-on/dark-on selectable
• Operating voltage: 10–30 V DC
• Max. output current: 100 mA; max. current consumption: 20 mA
• Switching frequency: 5 kHz; response time: 0.1 ms
• Connection: 4 open cable ends, 2 m cable length
• Protection rating: IP67
• Operating temperature: -25 °C to 55 °C
• Housing material: PBT
• Indicators: Yellow LED (output), green LED (operation)
• Minimum detectable object: 0.8 mm
• Mounting: M3 screw holes

Why choose it

This sensor combines a compact U-shaped housing with robust IP67 sealing, making it suitable for dusty or wet industrial environments. The selectable light-on/dark-on function adds flexibility, while the 5 kHz switching frequency and 0.1 ms response time handle fast-moving targets without missing a beat. The 2 m cable with open ends allows direct wiring to your controller, reducing installation time and cost.

Ideal use cases

• Edge detection and label sensing on packaging machines
• Part presence verification in assembly lines
• Counting small objects on conveyors
• Positioning control in automated handling systems

Good to know

The sensor's PBT housing withstands mechanical stress and many chemicals, while the IP67 rating ensures reliable operation even when exposed to moisture or dust. Its compact design fits into tight spaces, and the M3 mounting holes allow secure attachment to brackets or machine frames.