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Rectangular plastic sensor housing with M12 connector and mounting bracket

Sick

Sick WTB250-2P2441 photoelectric proximity sensor PNP

SKU CH-9YVN-N9KT3

Detects objects at 150–500 mm with background suppression, PNP output, IP67 housing, and M12 connector

  • Background suppression detects objects reliably
  • Sensing range covers 150 mm to 500 mm
  • Visible red LED simplifies alignment
  • PNP output with selectable light/dark switching
  • IP67 enclosure resists dust and water

Industrial proximity sensor for automated detection

The Sick WTB250-2P2441 is a photoelectric proximity sensor with background suppression designed for industrial automation tasks. It operates on a 10 V DC to 30 V DC supply and provides a PNP switching output with selectable light or dark switching via an L/D control cable. The rectangular ABS housing measures 20 mm by 65 mm by 43.9 mm and weighs 40 g. A BEF-W250 mounting bracket is included for installation.

Consistent detection across variable surfaces

Background suppression allows the sensor to ignore objects beyond the set range while reliably detecting targets between 150 mm and 500 mm regardless of colour or reflectivity. A visible red LED produces a 30 mm light spot at 500 mm distance with an approximate 3° dispersion angle. Sensitivity is adjusted using a two-turn potentiometer. The sensor delivers a 3 ms response time and a 160 Hz switching frequency with a maximum output current of 100 mA.

M12 connector and IP67 enclosure define

The 4-pin M12 male connector dictates the cabling interface and pin assignment for integration into control systems. Circuit protection includes safeguards labelled A through D and the unit meets Protection Class III requirements. The IP67-rated plastic housing with PMMA optics withstands ambient operating temperatures from –25 °C to +55 °C and storage temperatures down to –40 °C. Compliance is verified to EN 60947-5-2 with UL file numbers NRKH2.E300503 and NRKH8.E300503.

Highlights

  • Background suppression detects objects reliably
  • Sensing range covers 150 mm to 500 mm
  • Visible red LED simplifies alignment
  • PNP output with selectable light/dark switching
  • IP67 enclosure resists dust and water

Specifications

BrandSICK
ModelSICK WTB250-2P2441

Questions about this item

How much heat does the WTB250-2P2441 generate when powered continuously at 30 V DC?

Power consumption is 35 mA at 10 V DC to 30 V DC, giving a maximum dissipation of about 1 W, so the sensor runs cool during all-day operation.

What cable or connector must I already have to wire the M12 4-pin plug on this sensor?

You need a standard M12 4-pin female cordset; the sensor ships with a BEF-W250 mounting bracket but no cable.

Will the PNP light/dark switching output work directly with a 24 V DC PLC input card I already own?

Yes, the PNP output delivers up to 100 mA at the supply voltage, matching typical 24 V DC PLC input specifications.

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