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Small rectangular plastic photoelectric sensor with 2 m PVC cable

Sick

Sick WTB9-3P1161 photoelectric sensor PNP 2 m cable

SKU CH-H7Y2-FB5W6

Compact photoelectric sensor with background suppression, 20–350 mm range, PNP output, 2 m cable and IP69K rating

  • Background suppression detects objects reliably up to 350 mm
  • PinPoint LED produces a 4.5 mm light spot at 75 mm distance
  • 1,500 Hz switching frequency supports fast production lines
  • IP66 IP67 IP69K enclosure withstands harsh wash-down environments
  • 2 m PVC cable with 4-wire connection simplifies installation

Sick WTB9-3P1161 photoelectric sensor

The Sick WTB9-3P1161 is a rectangular photoelectric proximity sensor with background suppression for industrial detection tasks. It operates on 10 V DC to 30 V DC supply voltage and provides a PNP complementary output with light/dark switching. The visible red PinPoint LED emits at 650 nm wavelength with a 4.5 mm light spot at 75 mm distance. Sensing range reaches 20 mm to 350 mm maximum and 20 mm to 200 mm standard.

Installation with 2 m PVC cable and M3 mounting

The sensor connects via a 4-wire PVC cable measuring 2 m in length with 0.14 mm² conductor cross-section. Mounting uses an M3 hole on the 12.2 mm x 50 mm x 23.6 mm plastic VISTAL housing. Potentiometer adjustment offers 5 turns for precise background suppression setting. IP66, IP67 and IP69K enclosure ratings protect against water ingress during washdown. Misalignment or incorrect potentiometer turns can reduce reliable detection at the 200 mm range.

Sustained operation from –40 °C to +60 °C

The sensor maintains switching frequency of 1,500 Hz with response time under 0.333 ms across the full ambient operating temperature range. Power consumption stays at 30 mA with ripple below 5 Vpp during continuous use. Output current handles up to 100 mA while circuit protection guards against wiring faults. Plastic PMMA optics resist degradation in harsh environments up to +75 °C storage temperature. Protection class III insulation ensures safe low-voltage operation throughout extended duty cycles.

Highlights

  • Background suppression detects objects reliably up to 350 mm
  • PinPoint LED produces a 4.5 mm light spot at 75 mm distance
  • 1,500 Hz switching frequency supports fast production lines
  • IP66 IP67 IP69K enclosure withstands harsh wash-down environments
  • 2 m PVC cable with 4-wire connection simplifies installation

Specifications

BrandSICK
ModelSICK WTB9-3P1161

Questions about this item

How do I verify the WTB9-3P1161 is detecting correctly after wiring the 4-wire cable?

The complementary PNP outputs switch between light and dark modes; watch the LED indicator change state as a target moves through the 20–350 mm sensing range.

What comes in the box and what must I source separately for the WTB9-3P1161?

The sensor with its 2 m PVC cable is supplied; you must provide a 10–30 V DC power supply and M3 mounting hardware.

Which sensing range version of the WTB9-3P1161 should I choose for a 150 mm target distance?

This single model covers 20–200 mm (standard) and up to 350 mm maximum; the 150 mm distance falls well within the standard range.

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