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SICK WL8-P2231 — Photoelectric Sensors

SICK WL8-P2231 Photoelectric Retro-Reflective Sensor, PNP, 4

MPNWL8-P2231

SICK W8 series, WL8-P2231 photoelectric retro-reflective sensor, PNP output, 4 m sensing distance, 250 µs response, IP67, M8 connector.

$43.71Ref. price · indicative, final on quote
SICK WL8-P2231 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

WL8-P2231 — Identification
ParameterValue
SeriesW8
Sensor typePhotoelectric Retro-Reflective Sensor
WL8-P2231 — Sensing
ParameterValue
Sensing distance, max.4 m
Response time250 us
Light typeLED, Visible Red Light
WL8-P2231 — Electrical
ParameterValue
Operating voltage, min.10 V
Operating voltage, max.30 V
WL8-P2231 — Output
ParameterValue
Output typePNP
Load current100 mA
Switching typeLight-ON / Dark-ON
WL8-P2231 — Connection
ParameterValue
Termination typeConnector, M8
WL8-P2231 — Environmental
ParameterValue
Protection rating (IP)IP67
Operating temperature, min.-25 °C
Operating temperature, max.55 °C
WL8-P2231 — Mechanical
ParameterValue
Length20 mm
Width11 mm
Height31 mm

Product details

Sensor fit and deployment

The SICK WL8-P2231 is a photoelectric retro-reflective sensor from the W8 series, delivering a 4 m sensing distance with a visible red LED and a 250 µs response time. The PNP output switches 100 mA at 10–30 VDC, selectable Light-ON or Dark-ON. IP67 sealing means the housing and M8 connector tolerate washdown and airborne particulates — suitable for conveyor presence detection, packaging line product positioning, and automated storage aisle entry gates where a reflector is mounted opposite the sensor.

The 11 mm wide, 31 mm tall, 20 mm deep housing fits into tight mounting brackets and multi-sensor arrays. The M8 connector mates with standard M8 pigtails or pre-wired cordsets — no special tooling needed.

Response time and switching flexibility

A 250 µs response time catches fast-moving objects on high-speed conveyors and shuttle transfer cars. The Light-ON / Dark-ON selection via the control wire (or a DIP on some variants) lets the same sensor serve presence or gap detection without rewiring the output.

Frequently asked questions

Where can I buy WL8-P2231 and how do I get a price?

The WL8-P2231 is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

What is the closest functional second-source to WL8-P2231?

The WTB8-P2131 is a proximity-mode sensor (300 mm range) in the same W8 family, same 11 mm width, same M8 connector and PNP output — but it detects objects directly without a reflector, so it does not drop into a retro-reflective bracket without changing the mounting and wiring logic.

What is WL8-P2231's listed width?

The WL8-P2231 has a width of 11 mm.

What is WL8-P2231's listed height?

The WL8-P2231 has a height of 31 mm.

Will WL8-P2231 drop into a panel specified around WTB8-P2131 without rewiring?

No — the WTB8-P2131 is a proximity sensor (300 mm range) and the WL8-P2231 is a retro-reflective sensor (4 m range with reflector). Both share the same 11 mm width, M8 connector, and PNP output, but the sensing principle and required reflector differ, so a direct drop-in is not possible without changing the mounting and wiring logic.

MPN
WL8-P2231