{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"E3RBTP21OMI","brand":"Omron","brandSlug":"omron","productSlug":"E3RBTP21OMI","canonicalUrl":"https://aoctrl.com/omron/E3RBTP21OMI","factsUrl":"https://aoctrl.com/api/mcp/products/E3RBTP21OMI","rawCanonicalId":null},"summary":{"shortDescription":"Omron E3RB series through-beam photoelectric sensor, E3RBTP21OMI, 15 m sensing distance, PNP output, 100 mA load, 500 µs response, M12 4-pin connector, IP67/IP69K.","salesMarkdown":"## 15 m through-beam — where the range matters The E3RBTP21OMI is a through-beam photoelectric sensor from Omron's E3RB series, built for applications that need a clean break across a gap up to 15 m. That range puts it squarely in conveyor divert gates, long-travel crane end-of-travel, or pallet presence at the far end of a stretch — places a retroreflective or diffuse sensor would drift on target reflectance or background colour. The emitter and receiver are separate housings, so alignment is fixed at install but the detection is absolute — no false triggers from a dusty reflector or a shiny product passing through the beam. ## IP67/IP69K — washdown-ready, not just splash-proof Rated IP67 and IP69K, the sensor body and optics survive high-pressure hot-water washdown cycles typical in food-and-beverage or pharmaceutical lines. The M12 connector's O-ring is the wet-end seal — torque it to the mating cordset per the manufacturer's spec or the IP69K rating drops to IP67 on that face. Temperature range -25 °C to 55 °C covers most indoor process environments but not freezer tunnels; a cold-storage line would need a sensor rated below -25 °C. ## PNP output, 100 mA, 500 µs — what the PLC sees PNP sourcing output at 100 mA max — direct-connected to a standard 24 VDC PLC input module without a pull-up resistor or interposing relay for most loads. The 500 µs response time is fast enough for counting parts on a 2 m/s conveyor (the beam break is ~7.5 ms at that speed), but too slow for high-speed ejection at 10+ m/s where a sub-100 µs sensor would be needed. Light-ON / Dark-ON selectable via a switch on the housing — one sensor covers both presence and absence detection without rewiring or adding a NOT in the PLC logic. ## M12 4-pin connector — panel fit and swap Terminated with an M12 4-pin male connector. The pinout matches the industry-standard photoelectric sensor wiring (pin 1 = brown/B+, pin 2 = white/not used or output, pin 3 = blue/B-, pin 4 = black/output). That means it drops into a panel wired for an older E3S-C or E3JK sensor with the same M12 cordset — no re-pulling cables or changing the connector block. Length is 61 mm, so it fits the same mounting bracket footprint as the E3S-C series (57 mm body length) — the extra 4 mm is in the connector boss, not the mounting hole spacing.","metaTitle":"Omron E3RBTP21OMI Through Beam Photoelectric Sensor, 15 m","metaDescription":"Omron E3RBTP21OMI through-beam photoelectric sensor, 15 m range, PNP output, 500 µs response, IP67/IP69K. M12 4-pin connector. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"title":"E3RBTP21OMI","Length":"61 mm","Series":"E3RB","Light Type":"LED, Red","Sensor Type":"Through Beam","description":"Photoelectric Sensor PNP 15m 500us 30V 100mA LED, Red Connector, M12, 4-Pin IP67 / IP69K E3RB","Load Current":"100 mA","Response Time":"500 us","Switching Type":"Light-ON / Dark-ON","lifecycle_stage":"mature","Termination Type":"Connector, M12, 4-Pin","Protection Rating":"IP67;IP69K","Sensing Distance Max.":"15 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":"$159.86","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/28b4f4e9e7f1903d52e1036cb760cc69.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Will the E3RBTP21OMI replace an E3SCT66OMS without rewiring?","answer":"The E3RBTP21OMI uses the same M12 4-pin connector and PNP output, so the wiring is compatible. But the sensing range is 15 m versus 700 mm for the E3SCT66OMS — that's a 21× longer range, which is fine for most through-beam applications. The body length is 61 mm vs 57 mm, so the mounting bracket may need a 4 mm shift. No electrical rework needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/E3RBTP21OMI","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/omron/E3RBTP21OMI when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}