{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"E3Z-R81","brand":"Omron","brandSlug":"omron","productSlug":"E3Z-R81","canonicalUrl":"https://aoctrl.com/omron/E3Z-R81","factsUrl":"https://aoctrl.com/api/mcp/products/E3Z-R81","rawCanonicalId":null},"summary":{"shortDescription":"Omron E3Z series retroreflective photoelectric sensor, PNP output, 12-24V DC, 2m cable, IP67, Mirror Surface Rejection (MSR).","salesMarkdown":"## What you’re getting The E3Z-R81: This is a retroreflective photoelectric sensor from Omron’s E3Z series – the one with the Mirror Surface Rejection (MSR) trick. It’s PNP output, runs on 12-24V DC, and comes prewired with a 2-meter cable. The 4-meter sensing distance (minimum 100 mm) handles most conveyor and machine guarding jobs, and it’ll see right through shiny trouble that eats up standard retroreflectives. ## MSR – why it matters out here That Mirror Surface Rejection feature is the real value. Standard retroreflectives get fooled by a polished shaft or a chrome guard – they see the reflection and drop out. The MSR circuit filters that false echo, so a cleanly machined part or a mirror-finish panel won’t kill your signal. The body is PBT, sealed to IP67 – washdown-rated, dust-tight. The prewired cable exits the right-angle face, which keeps the connector out of the splash zone when mounted low on a machine frame.","metaTitle":"Omron E3Z-R81 Photoelectric Sensor, Retroreflective PNP, 4m,","metaDescription":"Omron E3Z-R81 retroreflective photoelectric sensor with Mirror Surface Rejection (MSR), PNP output, IP67, 4m range, 12-24V DC, 2m prewired cable. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"title":"E3Z-R81","Series":"E3Z","Features":"Mirror Surface Rejection (MSR)","IP Rating":"IP67","Standards":"CE","Display Qty":"1","description":"OMRON Photoelectric Sensor: Non-Terminated Cable, 12-24V DC, PNP, 2 m","Product Type":"Photoelectric Sensor","Body Material":"PBT","Overall Width":"11 mm","Response Time":"1 msec","Output Circuit":"PNP","Overall Height":"31 mm","Sensing Method":"Retroreflective","Supply Voltage":"12-24V DC","Sensor Diameter":"20 mm","lifecycle_stage":"current","Display Sell UOM":"EA","Sensor Body Style":"Rectangular","Minimum Object Size":"75mm Dia. Opaque","Output Circuit Type":"PNP","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","Sensor Face Orientation":"Right Angle","DC Supply Voltage Rating":"12-24V 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)":"31 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$63.50 – $174.55","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5a6875696c6e9f99bec2db327495fb93.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between E3Z-R81 and E3ZR61?","answer":"The E3ZR61 is the NPN output version. Everything else – sensing distance, IP67, MSR, cable, mounting – is identical. You cannot drop a PNP sensor into an NPN wiring scheme without changing the circuit."},{"question":"What compliance documentation does this sensor come with?","answer":"The sensor carries CE marking per the specs. No RoHS, REACH, or UL cert listed for this specific order code."},{"question":"Can the E3Z-R81 detect mirror-finished parts?","answer":"Yes – that’s the point of the Mirror Surface Rejection (MSR) feature. It filters false reflections from shiny surfaces so you get a true signal on polished metal or glass."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/E3Z-R81","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/E3Z-R81 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}}