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Small rectangular plastic sensor with red LED and M8 cable connector

Sick

Sick WT2S-P231 Photoelectric Proximity Sensor PNP

SKU CH-0ZN6-0T6D6

Detects objects 1 mm to 30 mm away using visible red PinPoint LED with background suppression in a 7.6 mm × 25.1 mm × 12.5 mm ABS housing rated IP67 and IP69K

  • PinPoint LED delivers visible red light at 660 nm wavelength
  • Background suppression ensures reliable detection from 1 mm to 30 mm
  • Compact 7.6 mm x 25.1 mm x 12.5 mm housing fits tight spaces
  • IP67 and IP69K ratings withstand harsh wash-down environments
  • Fast 800 Hz switching frequency with sub-0.6 ms response time

SICK WT2S-P231 Photoelectric Sensor

The SICK WT2S-P231 is a rectangular photoelectric proximity sensor that uses background suppression to detect objects. It emits visible red light from a PinPoint LED at a 660 nm wavelength. The sensor operates on a 10 V DC to 30 V DC supply voltage and provides a PNP switching output with light switching mode. It is housed in ABS plastic with PMMA optics and carries IP67 and IP69K enclosure ratings.

Automation engineers needing precise short-range

This sensor suits applications requiring a focused 1.5 mm light spot at a 15 mm focal distance within a 1 mm to 30 mm sensing range. Its 800 Hz switching frequency and sub-0.6 ms response time support high-speed counting or positioning tasks. Builders who need adjustable sensitivity, teach-in functionality, or a different output logic such as NPN or dark switching should look at other models.

Fixed 1 mm to 30 mm sensing range

The background suppression principle ignores objects beyond the set 30 mm maximum, ensuring reliable detection of targets close to reflective backgrounds. The 15 mm focus point and 1.5 mm spot size deliver consistent results on small parts. Connection is made via a 200 mm PVC cable terminated with a 3-pin M8 connector for quick installation in 10 V DC to 30 V DC systems.

How it compares

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Price $85.99
Cheaper than about 57% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK WT2S-P231

Questions about this item

What does the 30 mm sensing range mean once the sensor is installed?

The sensor reliably detects objects from 1 mm up to 30 mm away, with a focused 1.5 mm light spot at the 15 mm optimum distance.

How does the M8 3-pin connection limit the wiring options?

The 200 mm PVC cable ends in an M8 3-pin connector, so it plugs directly into a matching M8 socket without extra splicing.

What clearance does the 7.6 × 25.1 × 12.5 mm housing need to mount?

The rectangular ABS housing fits in a 7.6 mm wide slot and weighs 20 g, so it mounts on standard brackets or DIN rails with minimal space.

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