{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"WL8-P2231","brand":"SICK","brandSlug":"sick","productSlug":"WL8-P2231","canonicalUrl":"https://aoctrl.com/sick/WL8-P2231","factsUrl":"https://aoctrl.com/api/mcp/products/WL8-P2231","rawCanonicalId":null},"summary":{"shortDescription":"SICK W8 series, WL8-P2231 photoelectric retro-reflective sensor, PNP output, 4 m sensing distance, 250 µs response, IP67, M8 connector.","salesMarkdown":"## 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.","metaTitle":"SICK WL8-P2231 Photoelectric Retro-Reflective Sensor, PNP, 4","metaDescription":"SICK WL8-P2231 retro-reflective photoelectric sensor, PNP output, 4 m range, 250 µs response, IP67, M8 connector. Current lifecycle. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"Width":"11 mm","Height":"31 mm","Length":"20 mm","Series":"W8","Light Type":"LED, Visible Red Light","Sensor Type":"Photoelectric Retro-Reflective Sensor","Load Current":"100 mA","Response Time":"250 us","Switching Type":"Light-ON / Dark-ON","lifecycle_stage":"current","Termination Type":"Connector, M8","Protection Rating":"IP67","Sensing Distance Max.":"4 m","Operating Voltage Max.":"30 V","Operating Voltage Min.":"10 V","Operating Temperature Max.":"55 °C","Operating Temperature Min.":"-25 °C","Optical Sensor Output Type":"PNP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$43.71","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/20f2a4422187a70c5a853d93da27b08a.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/WL8-P2231/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy WL8-P2231 and how do I get a price?","answer":"The WL8-P2231 is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source to WL8-P2231?","answer":"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."},{"question":"What is WL8-P2231's listed width?","answer":"The WL8-P2231 has a width of 11 mm."},{"question":"What is WL8-P2231's listed height?","answer":"The WL8-P2231 has a height of 31 mm."},{"question":"Will WL8-P2231 drop into a panel specified around WTB8-P2131 without rewiring?","answer":"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."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/sick/WL8-P2231","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/sick/WL8-P2231 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}