{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"E3FA-TN21","brand":"Omron","brandSlug":"omron","productSlug":"E3FA-TN21","canonicalUrl":"https://aoctrl.com/omron/E3FA-TN21","factsUrl":"https://aoctrl.com/api/mcp/products/E3FA-TN21","rawCanonicalId":null},"summary":{"shortDescription":"Omron E3FA Series Through-Beam Photoelectric Sensor Set, NPN Output, 20 m Max Sensing Distance, M12 Connector, 10-30V DC, Plastic Body, IP67/IP69K.","salesMarkdown":"Omron E3FA-TN21 is a through-beam photoelectric sensor set covering a 20 m range with a 0.5 msec response time, enough for fast-moving objects on conveyor lines or long-distance presence detection. The NPN output and selectable light-on/dark-on switching let it match most PLC discrete inputs without a logic inverter. IP67 and IP69K sealing means this sensor survives washdown cycles and high-pressure cleaning — common in food processing or automotive paint shops. The M12 connector simplifies replacement; no need to pull new cable through the gland plate if the harness is intact. Right-angle orientation emits the beam perpendicular to the barrel. The M18 body and 4-pin M12 connector handle 10–30 V DC supply with 100 mA NPN output. ## Sourcing posture If you need a documented compliance declaration or factory calibration trace, include that in the RFQ.","metaTitle":"Omron E3FA-TN21 Through-Beam NPN Sensor, M12, 20m, IP69K","metaDescription":"Omron E3FA-TN21 through-beam photoelectric sensor set. NPN output, 20 m range, 0.5 ms response, IP67/IP69K, M12 connector. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Photoelectric Sensors"],"specifications":{"title":"E3FA-TN21","Series":"E3FA","Features":"Output Reverse Polarity Protection; Output Short Circuit Protection; Power Supply Reverse Polarity Protection","IP Rating":"IP67; IP69K","Standards":"CE","Display Qty":"1","description":"OMRON Photoelectric Sensor Set: M18 Threaded, Built-in Connector, 4 - Pin M12 Connector, 10-30V DC","Body Material":"Plastic","Response Time":"0.5 msec","Number of Pins":"4","Output Circuit":"NPN","Overall Height":"45 mm","Sensing Method":"Through-Beam","Supply Voltage":"10-30V DC","Sensor Diameter":"17 mm","lifecycle_stage":"current","Display Sell UOM":"EA","Overall Diameter":"17 mm","Sensor Body Style":"Cylindrical","Minimum Object Size":"7mm Dia. Opaque","Output Circuit Type":"NPN","Supply Voltage Type":"DC-Only","Emitted Sensor Light":"Red Light","Electrical Connection":"M12","Sensor Switching Mode":"Selectable Light On/Dark On","Load Current - Maximum":"100 mA","Nominal Sensor Diameter":"M18 Threaded","Sensor Face Orientation":"Right Angle","DC Supply Voltage Rating":"10-30V DC","Includes Indicator Lights":"Indicator Lights Included","Sensing Distance - Maximum":"20 m","Electrical Installation Type":"Direct Connector","Through Beam Sensor Component":"Photoelectric Sensor Transmitter and Receiver Set","Operating Temperature - Maximum":"131 °F","Operating Temperature - Minimum":"-13 °F"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$41.78","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f1c165d5f3e1b4a730bfbb25d27245da.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional alternative to the E3FA-TN21?","answer":"E3FA-TN112M is the same NPN through-beam sensor with identical sensing range and ratings, but it has a 2 m pre-wired cable instead of the M12 connector. The mounting is interchangeable, but field wiring differs."},{"question":"Will the E3FA-TN21 drop into a panel built for the E3FA-TN112M without rewiring?","answer":"No — the TN21 uses an M12 connector; the TN112M has a bare-wire cable. The sensor body and thread are identical, but you must either change the mating cable or use an M12-to-flying-lead adapter."},{"question":"What compliance documentation does the E3FA-TN21 carry?","answer":"CE marking is listed. Omron typically supports RoHS and REACH declarations for this series; request them at order time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/omron/E3FA-TN21","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/E3FA-TN21 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}}