{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"E3FB-RN112M","brand":"Omron","brandSlug":"omron","productSlug":"E3FB-RN112M","canonicalUrl":"https://aoctrl.com/omron/E3FB-RN112M","factsUrl":"https://aoctrl.com/api/mcp/products/E3FB-RN112M","rawCanonicalId":null},"summary":{"shortDescription":"Omron E3FB series retroreflective photoelectric sensor, M18 threaded cylindrical, NPN output, 4 m sensing distance, 2 m prewired cable, IP67/IP69K, 10-30V DC.","salesMarkdown":"## Retroreflective sensing, 4 m range, NPN output – fit overview This Omron E3FB-RN112M is a retroreflective photoelectric sensor in the E3FB series, housed in an M18 threaded brass barrel. It detects opaque objects as small as 7 mm diameter at distances from 100 mm to 4 m using a red LED beam and an external reflector (not included). The 0.5 msec response time suits high-speed counting or position sensing on conveyor lines. Output is NPN, selectable Light On or Dark On, sinking up to 100 mA at 10-30V DC. The prewired 2 m bare-wire cable simplifies installation into existing junction boxes or terminal strips; no connector to source or seal. The cylindrical barrel dimensions are standard 18 mm diameter x 44 mm length, fitting common mounting brackets and through-hole setups. ## How the key ratings decide fit The 4 m retroreflective range is the maximum with a standard reflector; actual sensing distance drops when using smaller or less efficient reflectors. Minimum detectable object is 7 mm diameter, so small parts are reliably seen at full range with adequate reflector alignment. The IP67 and IP69K ratings protect against dust ingress and temporary submersion, and high-pressure, high-temperature wash-downs common in food, beverage, and pharmaceutical lines. The brass body resists corrosion from caustic cleaning agents. Operating temperature -13°F to 131°F. Mirror Surface Rejection (MSR,) prevents false detection on highly reflective targets like polished metal, glass, or shrink-wrapped product. Without MSR, a retroreflective sensor may 'see' the shiny object as the reflector and miss it; MSR suppresses that behavior, so it can detect mirror-like items passing through the beam. ## Delta with the PNP, M12 sibling – E3FB-RP21 The closest functional sibling is the E3FB-RP21, which shares the same retroreflective sensing method, 4 m range, 0.5 ms response, MSR feature, and M18 brass barrel. The critical difference for a retrofit or alternate-source decision: the RN112M outputs NPN via a prewired bare cable, while the RP21 outputs PNP via a 4-pin M12 quick-disconnect connector. If your PLC or control card expects NPN (sinking) inputs, the RN112M is the correct drop-in; for PNP (sourcing) systems, choose the RP21. The connector type also matters – the RP21 requires a mating M12 cordset, whereas the RN112M's 2 m cable terminates directly in the panel.","metaTitle":"Omron E3FB-RN112M Photoelectric Sensor, Retroreflective, 4 m","metaDescription":"Omron E3FB-RN112M M18 retroreflective sensor with 4 m range, NPN output, 0.5 ms response, IP67/IP69K, MSR feature. Factory-fresh and fully warrantied via authorized distribution. C","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"Brand":"OMRON","Series":"E3FB","Features":"Mirror Surface Rejection (MSR)","IP Rating":"IP67; IP69K","Standards":"CE","Display Qty":"1","Product Type":"Photoelectric Sensor","Body Material":"Brass","Response Time":"0.5 msec","Output Circuit":"NPN","Overall Height":"44 mm","Sensing Method":"Retroreflective","Supply Voltage":"10-30V DC","Sensor Diameter":"18 mm","lifecycle_stage":"current","Display Sell UOM":"EA","Overall Diameter":"18 mm","Sensor Body Style":"Cylindrical","Minimum Object Size":"7mm Dia. Opaque","Output Circuit Type":"NPN","Sensor Cable Length":"2 m","Supply Voltage Type":"DC-Only","Emitted Sensor Light":"Red Light","Electrical Connection":"Bare Wire","Sensor Switching Mode":"Selectable Light On/Dark On","Load Current - Maximum":"100 mA","Nominal Sensor Diameter":"M18 Threaded","Sensor Face Orientation":"Straight","DC Supply Voltage Rating":"10-30V DC","Includes Indicator Lights":"Indicator Lights Included","Sensing Distance - Maximum":"4 m","Sensing Distance - Minimum":"100 mm","Electrical Installation Type":"Prewired Cable","Operating Temperature - Maximum":"131 °F","Operating Temperature - Minimum":"-13 °F","Cylindrical Sensor Dims. (D x L)":"18 mm x 44 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$32.51","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/E3FB-RN112M/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional sibling if I need PNP output?","answer":"The E3FB-RP21 is the PNP counterpart with the same 4 m retroreflective range, MSR, and M18 body, but it uses a 4-pin M12 connector instead of prewired cable."},{"question":"Can the E3FB-RN112M detect shiny or mirror-like objects?","answer":"Yes, the Mirror Surface Rejection (MSR) feature allows it to detect reflective targets without false triggering, a capability not found in standard retroreflective sensors."},{"question":"What compliance markings does this sensor carry?","answer":"The sensor is CE marked. The brass body and IP67/IP69K ratings support wash-down applications; check local codes for Food & Beverage or pharmaceutical line approvals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/omron/E3FB-RN112M","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/E3FB-RN112M 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}}